1.
Manchester Small-Scale Experimental Machine
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The Manchester Small-Scale Experimental Machine, nicknamed Baby, was the worlds first stored-program computer. It was built at the Victoria University of Manchester, England, Williams, Tom Kilburn and Geoff Tootill, and ran its first program on 21 June 1948. The machine was not intended to be a computer but was instead designed as a testbed for the Williams tube. Although considered small and primitive by the standards of its time, as soon as the SSEM had demonstrated the feasibility of its design, a project was initiated at the university to develop it into a more usable computer, the Manchester Mark 1. The Mark 1 in turn became the prototype for the Ferranti Mark 1. The SSEM had a 32-bit word length and a memory of 32 words, the program consisted of 17 instructions and ran for 52 minutes before reaching the correct answer of 131,072, after the SSEM had performed 3.5 million operations. The first design for a computer was Charles Babbages Analytical Engine in the 1830s. A century later, in 1936, mathematician Alan Turing published his description of what became known as a Turing machine, Turing proved that if an algorithm can be written to solve a mathematical problem, then a Turing machine can execute that algorithm. Konrad Zuses Z3 was the worlds first working programmable, fully automatic computer, with binary digital arithmetic logic, on 12 May 1941, it was successfully presented to an audience of scientists of the Deutsche Versuchsanstalt für Luftfahrt in Berlin. The Z3 stored its program on a tape, but it was electromechanical rather than electronic. The Colossus of 1943 was the first electronic computing device, the ENIAC was the first machine that was both electronic and general purpose. The construction of a von Neumann computer depended on the availability of a memory device on which to store the program. Radar transmitters send out regular brief pulses of energy, the reflections from which are displayed on a CRT screen. As operators are usually interested only in moving targets, it was desirable to filter out any distracting reflections from stationary objects. The filtering was achieved by comparing each received pulse with the previous pulse, to store each received pulse for later comparison it was passed through a transmission line, delaying it by exactly the time between transmitted pulses. This was one of several set up in the years following the Second World War with the aim of constructing a stored-program computer. The NPL did not have the expertise to build a machine like ACE, the Telecommunications Research Establishment was also approached for assistance, as was Maurice Wilkes at the University of Cambridge Mathematical Laboratory. The government department responsible for the NPL decided that, of all the work being carried out by the TRE on its behalf, ACE was to be given the top priority
2.
Teacher
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A teacher is a person who helps others to acquire knowledge, competences or values. Informally the role of teacher may be taken on by anyone, in some countries, teaching young people of school age may be carried out in an informal setting, such as within the family, rather than in a formal setting such as a school or college. Some other professions may involve a significant amount of teaching, in most countries, formal teaching is usually carried out by paid professional teachers. This article focuses on those who are employed, as their role, to teach others in a formal education context. A teachers role may vary among cultures, Teachers may provide instruction in literacy and numeracy, craftsmanship or vocational training, the arts, religion, civics, community roles, or life skills. Formal teaching tasks include preparing lessons according to agreed curricula, giving lessons, a teachers professional duties may extend beyond formal teaching. In some education systems, teachers may have responsibility for student discipline, Teaching is a highly complex activity. This is in part because teaching is a practice, that takes place in a specific context. Factors that influence what is expected of teachers include history and tradition, social views about the purpose of education, so the competences required by a teacher are affected by the different ways in which the role is understood around the world. Broadly, there seem to be four models, the teacher as manager of instruction, the teacher as caring person, the teacher as expert learner, some evidence-based international discussions have tried to reach such a common understanding. Scholarly consensus is emerging that what is required of teachers can be grouped under three headings, knowledge craft skills and dispositions and it has been found that teachers who showed enthusiasm towards the course materials and students can create a positive learning experience. These teachers do not teach by rote but attempt to find new invigoration for the materials on a daily basis. One of the challenges facing teachers is that they may have covered a curriculum until they begin to feel bored with the subject. Students who had enthusiastic teachers tend to rate them higher than teachers who didnt show much enthusiasm for the course materials, Teachers that exhibit enthusiasm can lead to students who are more likely to be engaged, interested, energetic, and curious about learning the subject matter. Recent research has found a correlation between teacher enthusiasm and students intrinsic motivation to learn and vitality in the classroom, students who experienced a very enthusiastic teacher were more likely to read lecture material outside of the classroom. There are various mechanisms by which teacher enthusiasm may facilitate higher levels of intrinsic motivation, teacher enthusiasm may contribute to a classroom atmosphere of energy and enthusiasm which feeds student interest and excitement in learning the subject matter. Enthusiastic teachers may also lead to becoming more self-determined in their own learning process. The concept of mere exposure indicates that the teachers enthusiasm may contribute to the expectations about intrinsic motivation in the context of learning
3.
Flight simulator
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A flight simulator is a device that artificially re-creates aircraft flight and the environment in which it flies, for pilot training, design, or other purposes. An area of training was for air gunnery handled by the pilot or a specialist air gunner, firing at a moving target requires aiming ahead of the target to allow for the time the bullets require to reach the vicinity of the target. This is sometimes also called deflection shooting and requires skill and practice, during World War I, some ground-based simulators were developed to teach this skill to new pilots. The best-known early flight simulation device was the Link Trainer, produced by Edwin Link in Binghamton, New York, USA and he later patented his design, which was first available for sale in 1929. The Link Trainer was a metal frame flight simulator usually painted in its well-known blue color. Some of these early war era flight simulators still exist, the Link family firm in Binghamton manufactured player pianos and organs, and Ed Link was therefore familiar with such components as leather bellows and reed switches. His design had a motion platform driven by inflatable bellows which provided pitch. A vacuum motor similar to those used in player pianos rotated the platform, a generic replica cockpit with working instruments was mounted on the motion platform. When the cockpit was covered, pilots could practice flying by instruments in a safe environment, the motion platform gave the pilot cues as to real angular motion in pitch, roll and yaw. Initially, aviation flight schools showed little interest in the Link Trainer, Link also demonstrated his trainer to the U. S. Army Air Force, but with no result. However, the changed in 1934 when the Army Air Force was given a government contract to fly the postal mail. This included having to fly in bad weather as well as good, during the first weeks of the mail service, nearly a dozen Army pilots were killed. The Army Air Force hierarchy remembered Ed Link and his trainer, Link flew in to meet them at Newark Field in New Jersey, and they were impressed by his ability to arrive on a day with poor visibility, due to practice on his training device. The result was that the USAAF purchased six Link Trainers, the principal pilot trainer used during World War II was the Link Trainer. Almost all US Army Air Force pilots were trained in a Link Trainer, a different type of World War II trainer was used for navigating at night by the stars. The Celestial Navigation Trainer of 1941 was 13.7 m high and it enabled sextants to be used for taking star shots from a projected display of the night sky. In 1954 United Airlines bought four flight simulators at a cost of $3 million from Curtiss-Wright that were similar to the models, with the addition of visuals, sound. This was the first of modern flight simulators for commercial aircraft
4.
Analog computer
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An analog computer is a form of computer that uses the continuously changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved. In contrast, digital computers represent varying quantities symbolically, as their values change. As an analog computer does not use values, but rather continuous values, processes cannot be reliably repeated with exact equivalence. Unlike digital signal processing, analog computers do not suffer from the quantization noise, Analog computers were widely used in scientific and industrial applications where digital computers of the time lacked sufficient performance. Analog computers can have a wide range of complexity. Slide rules and nomographs are the simplest, while naval gunfire control computers, systems for process control and protective relays used analog computation to perform control and protective functions. More complex applications, such as synthetic aperture radar, remained the domain of analog computing well into the 1980s, setting up an analog computer required scale factors to be chosen, along with initial conditions—that is, starting values. Another essential was creating the network of interconnections between computing elements. Sometimes it was necessary to re-think the structure of the problem so that the computer would function satisfactorily, no variables could be allowed to exceed the computers limits, and differentiation was to be avoided, typically by rearranging the network of interconnects, using integrators in a different sense. Running an electronic computer, assuming a satisfactory setup, started with the computer held with some variables fixed at their initial values. Moving a switch released the holds and permitted the problem to run, in some instances, the computer could, after a certain running time interval, repeatedly return to the initial-conditions state to reset the problem, and run it again. This is a list of examples of early computation devices which are considered to be precursors of the modern computers, some of them may even have been dubbed as computers by the press, although they may fail to fit the modern definitions. The south-pointing chariot can be considered the earliest analog computer and it was a mechanical-geared wheeled vehicle used for to discern the southern cardinal direction. The Antikythera mechanism was an orrery and is claimed to be the earliest known mechanical analog computer. It was designed to calculate astronomical positions and it was discovered in 1901 in the Antikythera wreck off the Greek island of Antikythera, between Kythera and Crete, and has been dated to circa 100 BC. Devices of a level of complexity comparable to that of the Antikythera mechanism would not reappear until a thousand years later, many mechanical aids to calculation and measurement were constructed for astronomical and navigation use. The planisphere was a star chart invented by Abū Rayḥān al-Bīrūnī in the early 11th century, the astrolabe was invented in the Hellenistic world in either the 1st or 2nd centuries BC and is often attributed to Hipparchus. A combination of the planisphere and dioptra, the astrolabe was effectively an analog computer capable of working out different kinds of problems in spherical astronomy
5.
PLATO (computer system)
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PLATO was the first generalized computer-assisted instruction system. Starting in 1960, it ran on the University of Illinois ILLIAC I computer, by the late 1970s, it supported several thousand graphics terminals distributed worldwide, running on nearly a dozen different networked mainframe computers. PLATO was designed and built by the University of Illinois and functioned for four decades, offering coursework to UIUC students, local schools, courses were taught in a range of subjects, including Latin, chemistry, education and primary mathematics. Rights to market PLATO as a product were licensed by Control Data Corporation. CDC President William Norris planned to make PLATO a force in the computer world, PLATO nevertheless built a strong following in certain markets, and the last production PLATO system did not shut down until 2006, coincidentally just a month after Norris died. Bill that provided free education to World War II veterans, higher education was limited to a minority of the US population. The trend towards greater enrollment was notable by the early 1950s, to wit, if computerized automation increased factory production, it could do the same for academic instruction. The USSRs 1957 launching of the Sputnik I artificial satellite energized the United States government into spending more on science, after weeks of meetings they were unable to agree on a single design. Before conceding failure, Alpert mentioned the matter to laboratory assistant Donald Bitzer, Bitzer, regarded as the Father of PLATO, recognized that in order to provide quality computer-based education, good graphics were critical. This at a time when 10-character-per-second teleprinters were the norm, in 1960, the first system, PLATO I, operated on the local ILLIAC I computer. It included a set for display and a special keyboard for navigating the systems function menus, PLATO II, in 1961. The only remote PLATO III terminal was located near the capitol in Springfield. It was connected to the PLATO III system by a video connection, accordingly, in 1967 the National Science Foundation granted the team steady funding, allowing Alpert to set up the Computer-based Education Research Laboratory at the university. In 1972 a new system named PLATO IV was ready for operation, the PLATO IV terminal was a major innovation. It included Bitzers orange plasma display invention which incorporated both memory and bitmapped graphics into one display and this plasma display included fast vector line drawing capability and ran at 1260 baud, rendering 60 lines or 180 characters per second. The display was a 512×512 bitmap, with character and vector plotting done by hardwired logic. Users could provide their own characters to support rudimentary bitmap graphics, compressed air powered a piston-driven microfiche image selector that permitted colored images to be projected on the back of the screen under program control. The PLATO IV display also included a 16×16 grid infrared touch panel allowing students to answer questions by touching anywhere on the screen and it was also possible to connect the terminal to peripheral devices
6.
Altair 8800
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The Altair 8800 is a microcomputer designed in 1974 by MITS and based on the Intel 8080 CPU. The designers hoped to sell a few hundred build-it-yourself kits to hobbyists, the Altair also appealed to individuals and businesses that just wanted a computer and purchased the assembled version. The Altair is widely recognized as the spark that ignited the microcomputer revolution as the first commercially successful personal computer, the model rocket kits were a modest success and MITS wanted to try a kit that would appeal to more hobbyists. The November 1970 issue of Popular Electronics featured the Opticom, a kit from MITS that would send voice over an LED light beam, Mims and Cagle were losing interest in the kit business so Roberts bought his partners out, then began developing a calculator kit. Electronic Arrays had just announced a set of six LSI integrated circuit chips that would make a four-function calculator, the MITS816 calculator kit used the chip set and was featured on the November 1971 cover of Popular Electronics. This calculator kit sold for $175, Forrest Mims wrote the assembly manual for this kit and many others over the next several years. He often accepted a copy of the kit as payment, the calculator was successful and was followed by several improved models. The MITS1440 calculator was featured in the July 1973 issues of Radio-Electronics and it had a 14-digit display, memory, and square root function. The kit sold for $200 and the version was $250. MITS later developed a unit that would connect to the 816 or 1440 calculator. In addition to calculators, MITS made a line of test equipment kits and these included an IC tester, a waveform generator, a digital voltmeter, and several other instruments. To keep up with the demand, MITS moved into a building at 6328 Linn NE in Albuquerque in 1973. They installed a wave soldering machine and a line at the new location. In 1972, Texas Instruments developed its own calculator chip and started selling complete calculators at less than half the price of other commercial models, MITS and many other companies were devastated by this, and Roberts struggled to reduce his quarter-million-dollar debt. In January 1972, Popular Electronics merged with another Ziff-Davis magazine, the change in editorial staff upset many of their authors, and they started writing for a competing magazine, Radio-Electronics. In 1972 and 1973, some of the best construction projects appeared in Radio-Electronics, in 1974, Art Salsberg became editor of Popular Electronics. It was Salsbergs goal to reclaim the lead in electronics projects and he was impressed with Don Lancasters TV Typewriter article and wanted computer projects for Popular Electronics. Don Lancaster did an ASCII keyboard for Popular Electronics in April 1974 and they were evaluating a computer trainer project by Jerry Ogdin when the Mark-8 8008-based computer by Jonathan Titus appeared on the July 1974 cover of Radio-Electronics
7.
Apple II
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The Apple II is an 8-bit home computer, one of the first highly successful mass-produced microcomputer products, designed primarily by Steve Wozniak. It was introduced in 1977 at the West Coast Computer Faire by Jobs and was the first consumer product sold by Apple Computer and it is the first model in a series of computers which were produced until Apple IIe production ceased in November 1993. The Apple II marks Apples first launch of a computer aimed at a consumer market – branded towards American households rather than businessmen or computer hobbyists. Along with the PET2001 and the TRS-80, Byte magazine referred to these as the 1977 Trinity of personal computing. The Apple II had the feature of being able to display color graphics. By 1976, Steve Jobs had convinced the product designer Jerry Manock to create the shell for the Apple II – a smooth case inspired by kitchen appliances that would conceal the internal mechanics. The earliest Apple IIs were assembled in Silicon Valley, and later in Texas, printed circuit boards were manufactured in Ireland, the original retail price of the computer was $1,298 and $2,638. To reflect the color graphics capability, the Apple logo on the casing has rainbow stripes. Perhaps most significantly, the Apple II was a catalyst for personal computers across many industries, the Apple II used a multiplicity of idiosyncratic engineering shortcuts to save hardware and reduce costs. This arrangement simultaneously eliminated the need for a separate circuit for the DRAM chips. Similarly, in the graphics mode, color is determined by pixel position and can thus be implemented in software. This also allows for subpixel font rendering since orange and blue pixels appear half a pixel-width farther to the right on the screen than green, the Apple II at first used data cassette storage like most other microcomputers of the time. In 1978 the company introduced an external 5 1⁄4-inch floppy disk drive, the Disk II interface, created by Wozniak, is regarded as an engineering masterpiece for its economy of electronic components. The approach taken in the Disk II controller is typical of Wozniaks designs, with a few small-scale logic chips and a cheap PROM, he created a functional floppy-disk interface at a fraction of the component cost of standard circuit configurations. The cost of such terminals could easily exceed the price of the computer itself, the Apple IIs PCB underwent several revisions as Steve Wozniak made modifications to it. The earliest version was known as Revision 0, and the first 6000 units shipped used it, later revisions added a color killer circuit to prevent color fringing when the computer was in text mode, as well as modifications to improve the reliability of cassette I/O. Revision 0 Apple IIs powered up in a mode and had garbage on screen. This was eliminated on the later board revisions, Revision 0 Apple IIs could display only four colors, but Wozniak was later able to generate 16 in low-res mode
8.
Commodore PET
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The Commodore PET is a line of home/personal computers produced starting in 1977 by Commodore International. The first model, which was named the PET2001, was the personal computer ever made available to retail consumers, after the Apple II. In the 1970s Commodore was one of many companies selling calculators designed around Dallas-based Texas Instruments chips. Commodore responded to this by searching for a set they could purchase outright. At Commodore, Peddle convinced Jack Tramiel that calculators were a dead-end, in September 1976 Peddle got a demonstration of Jobs and Wozniaks Apple II prototype, when Jobs was offering to sell it to Commodore, but Commodore considered Jobs offer too expensive. Tramiel demanded that Peddle, Bill Seiler, and John Feagans create a computer in time for the June 1977 Consumer Electronics Show, tramiels son, Leonard, helped design the PETSCII graphic characters and acted as quality control. The result was the first all-in-one home computer, the PET and its 6502 processor controlled the screen, keyboard, cassette tape recorders and any peripherals connected to one of the computers several expansion ports. The machine also included a built-in Datasette for data storage located on the front of the case, the data transfer rate to cassette tape was 1500 baud, but the data was recorded to tape twice for safety, giving an effective rate of 750 baud. The PET2001 was announced at the Winter CES in January 1977, however, the PET was back-ordered for months and to ease deliveries, early in 1978 Commodore decided to cancel the 4 kB version. However, this took six months to finally happen, during which time Microsoft lost money. At the end of the year, the company was saved by Apples decision to license Microsoft BASIC for the Apple II line. The key tops also tended to rub off easily, reliability was fairly poor, although that was not atypical of many early microcomputers. Because of the keyboard on the PET, external replacement ones quickly appeared. On the other hand, Commodore was a year behind Apple, in 1979, Commodore replaced the original PET2001 with an improved model known as the 2001-N. The new machine used a standard green-phosphor monitor in place of the blue in the original 2001. It now had a conventional, full-sized keyboard and no longer sported the built-in cassette recorder, the kernel ROM was upgraded to add support for Commodores newly introduced disk drive line. It was offered in 8kB, 16kB, or 32kB models as the 2001-N8, 2001-N16, the 2001-N switched to using conventional DRAM instead of the 6550 SRAM in the original model. PET 2001-8Ns had eight 2108 DRAMs and 2001-16Ns used sixteen 2108s, the PET4016 used eight 4116 chips
9.
Commodore VIC-20
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The VIC-20 is an 8-bit home computer that was sold by Commodore Business Machines. The VIC-20 was announced in 1980, roughly three years after Commodores first personal computer, the PET, the VIC-20 was the first computer of any description to sell one million units. The VIC-20 was intended to be more economical than the PET computer and it was equipped with 5 KB of static RAM and used the same MOS6502 CPU as the PET. As the Apple II gained momentum with the advent of VisiCalc in 1979, Jack Tramiel wanted a product that would compete in the same segment, for this reason Chuck Peddle and Bill Seiler started to design a computer named TOI. The TOI computer failed to materialize, mostly because it required an 80-column character display which in turn required the MOS Technology 6564 chip, however, the chip could not be used in the TOI since it required very expensive static RAM to operate fast enough. The serial IEEE 488-derivative CBM-488 interface was designed by Glen Stark, some features, like the memory add-in board, were designed by Bill Seiler. Altogether, the VIC20 development team consisted of five people, wed swipe whatever equipment we needed to get our jobs done. There was no way to get the work done. Theyd discover it was missing and they would just order more stuff from the warehouse, at the time, Commodore had an oversupply of 1 kbit×4 SRAM chips, so Tramiel decided that these should be used in the new computer. The end result was closer to the PET or TOI computers than to Yannes prototype. The original Revision A system board found in all silver-label VIC-20s used 2114 SRAMs and due to their tiny size, ten of them were required to reach 5k of system RAM. The Revision B system board, found in rainbow logo VIC-20s switched to larger 2048 byte SRAMs which reduced the count to five chips,2 x 2048 bytes chips +3 x 2114 chips. VIC-20s went through several variations in their 3-1/2 years of production, first-year models had a PET-style keyboard with a blocky font while most VIC-20s made during 1982 had a slightly different keyboard also shared with early C64s. The rainbow logo VIC-20 was introduced in early 1983 and has the newer C64 keyboard with gray function keys and it has a similar power supply to the C64 PSU, although the amperage is slightly lower. Older Revision A VIC-20s cannot use a C64 PSU or vice versa as their power requirement is too high, in April 1980, at a meeting of general managers outside London, Jack Tramiel declared that he wanted a low-cost color computer. When most of the GMs argued against it, he said, The Japanese are coming and this was in keeping with Tramiels philosophy which was to make computers for the masses, not the classes. Then, the project was given to Commodore Japan, a team led by Yash Terakura created the VIC-1001 for the Japanese market. The VIC-20 was marketed in Japan as VIC-1001 before VIC-20 was introduced to the US, when they returned to California from that meeting, Tomczyk wrote a 30-page memo detailing recommendations for the new computer, and presented it to Tramiel
10.
Commodore 64
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The Commodore 64, also known as the C64, C-64, C=64, or occasionally CBM64 or VIC-64 in Sweden, is an 8-bit home computer introduced in January 1982 by Commodore International. It is listed in the Guinness World Records as the single computer model of all time. Volume production started in early 1982, marketing in August for US$595, preceded by the Commodore VIC-20 and Commodore PET, the C64 took its name from its 64 kilobytes of RAM. It had superior sound and graphical specifications compared to earlier systems such as the Apple II and Atari 800, with multi-color sprites. The C64 dominated the low-end computer market for most of the 1980s. Sam Tramiel, a later Atari president and the son of Commodores founder, said in a 1989 interview, When I was at Commodore we were building 400,000 C64s a month for a couple of years. In the UK market, the C64 faced competition from the BBC Micro and the ZX Spectrum, part of the Commodore 64s success was its sale in regular retail stores instead of only electronics and/or computer hobbyist specialty stores. Commodore produced many of its parts in-house to control costs, including custom integrated circuit chips from MOS Technology and it has been compared to the Ford Model T automobile for its role in bringing a new technology to middle-class households via creative and affordable mass-production. Approximately 10,000 commercial software titles have made for the Commodore 64 including development tools, office productivity applications. C64 emulators allow anyone with a computer, or a compatible video game console. The C64 is also credited with popularizing the computer demoscene and is used today by some computer hobbyists. In 2008,17 years after it was taken off the market, in January 1981, MOS Technology, Inc. Commodores integrated circuit design subsidiary, initiated a project to design the graphic, Design work for the chips, named MOS Technology VIC-II and MOS Technology SID, was completed in November 1981. Commodore then began a game console project that would use the new chips—called the Ultimax or the Commodore MAX Machine and this project was eventually cancelled after just a few machines were manufactured for the Japanese market. At the same time, Robert Bob Russell and Robert Bob Yannes were critical of the current product line-up at Commodore, with the support of Al Charpentier and Charles Winterble, they proposed to Commodore CEO Jack Tramiel a true low-cost sequel to the VIC-20. Tramiel dictated that the machine should have 64 KB of random-access memory, although 64-Kbit dynamic random-access memory chips cost over US$100 at the time, he knew that DRAM prices were falling, and would drop to an acceptable level before full production was reached. The product was named the VIC-40 as the successor to the popular VIC-20. The team that constructed it consisted of Yash Terakura, Bob Russell, Bob Yannes, the design, prototypes and some sample software were finished in time for the show, after the team had worked tirelessly over both Thanksgiving and Christmas weekends
11.
Educational technology
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Educational technology refers to the use of both physical hardware and educational theoretics. It encompasses several domains, including learning theory, computer-based training, online learning, and, Technology in education and education technology are two different concepts which deal with the use of technological tools and innovative educational strategies respectively. Educational technology is not restricted to high technology, Education technology is anything that enhances classroom learning in the utilization of blended or online learning. However, modern educational technology is an important part of society today. Each of these terms has had its advocates, who point up potential distinctive features. In practice, as technology has advanced, the narrowly defined terminological aspect that was initially emphasized by name has blended into the general field of educational technology. Initially, virtual learning as defined in a semantic sense implied entering an environmental simulation within a virtual world. In practice, an education course refers to any instructional course in which all. As a further example, ubiquitous learning emphasizes an omnipresent learning milieu, smart learning is a component of the smart city concept. Helping people learn in ways that are easier, faster, surer, or less expensive can be traced back to the emergence of early tools. Various types of abacus have been used, writing slates and blackboards have been used for at least a millennium. From their introduction, books and pamphlets have held a prominent role in education, from the early twentieth century, duplicating machines such as the mimeograph and Gestetner stencil devices were used to produce short copy runs for classroom or home use. The first all multiple choice, large-scale assessment was the Army Alpha, used to assess the intelligence, further large-scale use of technologies was employed in training soldiers during and after WWII using films and other mediated materials, such as overhead projectors. The concept of hypertext is traced to the description of memex by Vannevar Bush in 1945, slide projectors were widely used during the 1950s in educational institutional settings. Cuisenaire rods were devised in the 1920s and saw use from the late 1950s. Stanfords Education Program for Gifted Youth is descended from early experiments. In 1971, Ivan Illich published an influential book called, Deschooling Society. By the mid-1980s, accessing course content became possible at many college libraries, in computer-based training or computer-based learning, the learning interaction was between the student and computer drills or micro-world simulations
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Dictionary
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It is a lexicographical product which shows inter-relationships among the data. A broad distinction is made between general and specialized dictionaries, Specialized dictionaries include words in specialist fields, rather than a complete range of words in the language. Lexical items that describe concepts in specific fields are called terms instead of words. In practice, the two approaches are used for both types, there are other types of dictionaries that do not fit neatly into the above distinction, for instance bilingual dictionaries, dictionaries of synonyms, and rhyming dictionaries. The word dictionary is usually understood to refer to a general purpose monolingual dictionary, there is also a contrast between prescriptive or descriptive dictionaries, the former reflect what is seen as correct use of the language while the latter reflect recorded actual use. Stylistic indications in many modern dictionaries are also considered by some to be less than objectively descriptive, the birth of the new discipline was not without controversy, the practical dictionary-makers being sometimes accused by others of astonishing lack of method and critical-self reflection. The oldest known dictionaries were Akkadian Empire cuneiform tablets with bilingual Sumerian–Akkadian wordlists, discovered in Ebla, the early 2nd millennium BCE Urra=hubullu glossary is the canonical Babylonian version of such bilingual Sumerian wordlists. Philitas of Cos wrote a pioneering vocabulary Disorderly Words which explained the meanings of rare Homeric and other words, words from local dialects. Apollonius the Sophist wrote the oldest surviving Homeric lexicon, the first Sanskrit dictionary, the Amarakośa, was written by Amara Sinha c. 4th century CE. Written in verse, it listed around 10,000 words, according to the Nihon Shoki, the first Japanese dictionary was the long-lost 682 CE Niina glossary of Chinese characters. The oldest existing Japanese dictionary, the c.835 CE Tenrei Banshō Meigi, was also a glossary of written Chinese, a 9th-century CE Irish dictionary, Sanas Cormaic, contained etymologies and explanations of over 1,400 Irish words. In India around 1320, Amir Khusro compiled the Khaliq-e-bari which mainly dealt with Hindavi, in medieval Europe, glossaries with equivalents for Latin words in vernacular or simpler Latin were in use. The Catholicon by Johannes Balbus, a large grammatical work with a lexicon, was widely adopted. It served as the basis for several bilingual dictionaries and was one of the earliest books to be printed, in 1502 Ambrogio Calepinos Dictionarium was published, originally a monolingual Latin dictionary, which over the course of the 16th century was enlarged to become a multilingual glossary. The first monolingual dictionary written in Europe was the Spanish, written by Sebastián Covarrubias Tesoro de la lengua castellana o española, published in 1611 in Madrid, in 1612 the first edition of the Vocabolario dellAccademia della Crusca, for Italian, was published. It served as the model for works in French and English. In 1690 in Rotterdam was published, posthumously, the Dictionnaire Universel by Antoine Furetière for French, in 1694 appeared the first edition of the Dictionnaire de lAcadémie française. Between 1712 and 1721 was published the Vocabulario portughez e latino written by Raphael Bluteau, the Totius Latinitatis lexicon by Egidio Forcellini was firstly published in 1777, it has formed the basis of all similar works that have since been published
