Kamikaze Tokubetsu Kōgekitai, were a part of the Japanese Special Attack Units of military aviators who initiated suicide attacks for the Empire of Japan against Allied naval vessels in the closing stages of the Pacific campaign of World War II, designed to destroy warships more than possible with conventional air attacks. About 3,800 kamikaze pilots died during the war, more than 7,000 naval personnel were killed by kamikaze attacks. Kamikaze aircraft were pilot-guided explosive missiles, purpose-built or converted from conventional aircraft. Pilots would attempt to crash their aircraft into enemy ships in what was called a "body attack" in planes laden with some combination of explosives and torpedoes. Accuracy was much higher than that of conventional attacks, the payload and explosion larger. A kamikaze could sustain damage that would disable a conventional attacker and still achieve its objective; the goal of crippling or destroying large numbers of Allied ships aircraft carriers, was considered by the Empire of Japan to be a just reason for sacrificing pilots and aircraft.
These attacks, which began in October 1944, followed several critical military defeats for the Japanese. They had long since lost aerial dominance as a result of having outdated aircraft and enduring the loss of experienced pilots. Japan suffered from a diminishing capacity for war and a declining industrial capacity relative to that of the Allies. Japan was losing pilots faster than it could train their replacements; these combined factors, along with Japan's unwillingness to surrender, led to the use of kamikaze tactics as Allied forces advanced towards the Japanese home islands. While the term kamikaze refers to the aerial strikes, it has been applied to various other suicide attacks; the Japanese military used or made plans for non-aerial Japanese Special Attack Units, including those involving submarines, human torpedoes and divers. The tradition of death instead of defeat and shame was entrenched in Japanese military culture. One of the primary traditions in the samurai life and the Bushido code: loyalty and honor until death.
The Japanese word kamikaze is translated as "divine wind". The word originated from Makurakotoba of waka poetry modifying "Ise" and has been used since August 1281 to refer to the major typhoons that dispersed Mongol-Koryo fleets who invaded Japan under Kublai Khan in 1274. A Japanese monoplane that made a record-breaking flight from Tokyo to London in 1937 for the Asahi newspaper group was named Kamikaze, she was a prototype for the Mitsubishi Ki-15. In Japanese, the formal term used for units carrying out suicide attacks during 1944–1945 is tokushu kōgekitai, which means "special attack unit"; this is abbreviated to tokkōtai. More air suicide attack units from the Imperial Japanese Navy were called shinpū tokubetsu kōgeki tai. Shinpū is the on-reading of the same characters. During World War II, the pronunciation kamikaze was used only informally in the Japanese press in relation to suicide attacks, but after the war this usage gained acceptance worldwide and was re-imported into Japan; as a result, the special attack units are sometimes known in Japan as kamikaze tokubetsu kōgeki tai.
Before the formation of kamikaze units, pilots had made deliberate crashes as a last resort when their planes had suffered severe damage and they did not want to risk being captured, or wanted to do as much damage to the enemy as possible, since they were crashing anyway. Such situations occurred in both the Allied air forces. Axell and Kase see these suicides as "individual, impromptu decisions by men who were mentally prepared to die". In most cases, little evidence exists that such hits represented more than accidental collisions of the kind that sometimes happen in intense sea or air battles. One example of this occurred on 7 December 1941 during the attack on Pearl Harbor. First Lieutenant Fusata Iida's plane had taken a hit and had started leaking fuel when he used it to make a suicide attack on Naval Air Station Kaneohe. Before taking off, he had told his men that if his plane were to become badly damaged he would crash it into a "worthy enemy target"; the carrier battles in 1942 Midway, inflicted irreparable damage on the Imperial Japanese Navy Air Service, such that they could no longer put together a large number of fleet carriers with well-trained aircrews.
Japanese planners had assumed a quick war and lacked comprehensive programmes to replace the losses of ships and sailors. The following Solomon Islands campaign and the New Guinea campaign, notably the Battles of Eastern Solomons and Santa Cruz, further decimated the IJNAS veteran aircrews, replacing their combat experience proved impossible. During 1943–1944, U. S. forces advanced toward Japan. Newer U. S.-made planes the Grumman F6F Hellcat and Vought F4U Corsair and soon outnumbered Japan's fighter planes. Tropical diseases, as well as shortages of spare parts and fuel, made operations more and more difficult for the IJNAS. By the Battle of the Philippine Sea, the Japanese had to make do with obsolete aircraft and inexperienced aviators in the f
The Amiga is a family of personal computers introduced by Commodore in 1985. The original model was part of a wave of 16- and 32-bit computers that featured 256 KB or more of RAM, mouse-based GUIs, improved graphics and audio over 8-bit systems; this wave included the Atari ST—released the same year—Apple's Macintosh, the Apple IIGS. Based on the Motorola 68000 microprocessor, the Amiga differed from its contemporaries through the inclusion of custom hardware to accelerate graphics and sound, including sprites and a blitter, a pre-emptive multitasking operating system called AmigaOS; the Amiga 1000 was released in July 1985, but a series of production problems kept it from becoming available until early 1986. The best selling model, the Amiga 500, was introduced in 1987 and became one of the leading home computers of the late 1980s and early 1990s with four to six million sold; the A3000, introduced in 1990, started the second generation of Amiga systems, followed by the A500+, the A600 in March 1992.
As the third generation, the A1200 and the A4000 were released in late 1992. The platform became popular for gaming and programming demos, it found a prominent role in the desktop video, video production, show control business, leading to video editing systems such as the Video Toaster. The Amiga's native ability to play back multiple digital sound samples made it a popular platform for early tracker music software; the powerful processor and ability to access several megabytes of memory enabled the development of several 3D rendering packages, including LightWave 3D, Aladdin4D, TurboSilver and Traces, a predecessor to Blender. Although early Commodore advertisements attempt to cast the computer as an all-purpose business machine when outfitted with the Amiga Sidecar PC compatibility add-on, the Amiga was most commercially successful as a home computer, with a wide range of games and creative software. Poor marketing and the failure of the models to repeat the technological advances of the first systems meant that the Amiga lost its market share to competing platforms, such as the fourth generation game consoles and the dropping prices of IBM PC compatibles which gained 256-color VGA graphics in 1987.
Commodore went bankrupt in April 1994 after the Amiga CD32 model failed in the marketplace. Since the demise of Commodore, various groups have marketed successors to the original Amiga line, including Genesi, Eyetech, ACube Systems Srl and A-EON Technology. AmigaOS has influenced replacements and compatible systems such as MorphOS, AmigaOS 4 and AROS. "The Amiga was so far ahead of its time that nobody—including Commodore's marketing department—could articulate what it was all about. Today, it's obvious the Amiga was the first multimedia computer, but in those days it was derided as a game machine because few people grasped the importance of advanced graphics and video. Nine years vendors are still struggling to make systems that work like 1985 Amigas." Jay Miner joined Atari in the 1970s to develop custom integrated circuits, led development of the Atari 2600's TIA. As soon as its development was complete, the team began developing a much more sophisticated set of chips, CTIA, ANTIC and POKEY, that formed the basis of the Atari 8-bit family.
With the 8-bit line's launch in 1979, the team once again started looking at a next generation chipset. Nolan Bushnell had sold the company to Warner Communications in 1978, the new management was much more interested in the existing lines than development of new products that might cut into their sales. Miner wanted to start work with the new Motorola 68000, but management was only interested in another 6502 based system. Miner left the company, for a time, the industry. In 1979, Larry Kaplan founded Activision. In 1982, Kaplan was approached by a number of investors. Kaplan hired Miner to run the hardware side of the newly formed company, "Hi-Toro"; the system was code-named "Lorraine" in keeping with Miner's policy of giving systems female names, in this case the company president's wife, Lorraine Morse. When Kaplan left the company late in 1982, Miner was promoted to head engineer and the company relaunched as Amiga Corporation. A breadboard prototype was completed by late 1983, shown at the January 1984 Consumer Electronics Show.
At the time, the operating system was not ready, so the machine was demonstrated with the Boing Ball demo. A further developed version of the system was demonstrated at the June 1984 CES and shown to many companies in hopes of garnering further funding, but found little interest in a market, in the final stages of the North American video game crash of 1983. In March, Atari expressed a tepid interest in Lorraine for its potential use in a games console or home computer tentatively known as the 1850XLD, but the talks were progressing and Amiga was running out of money. A temporary arrangement in June led to a $500,000 loan from Atari to Amiga to keep the company going; the terms required the loan to be repaid at the end of the month, otherwise Amiga would forfeit the Lorraine design to Atari. During 1983, Atari lost over $1 million a week, due to the combined effects of the crash and the ongoing price war in the home computer market. By the end of the year, Warner was desperate to sell the company.
In January 1984, Jack Tramiel resigned from Commodore due to internal battles over the future direction of the company. A number of Commodore employees followed him to Tramiel Technology; this included a number of the senior technical staff, where they began development of a 68000-based machine of the
Microsoft Windows is a group of several graphical operating system families, all of which are developed and sold by Microsoft. Each family caters to a certain sector of the computing industry. Active Windows families include Windows Embedded. Defunct Windows families include Windows Mobile and Windows Phone. Microsoft introduced an operating environment named Windows on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces. Microsoft Windows came to dominate the world's personal computer market with over 90% market share, overtaking Mac OS, introduced in 1984. Apple came to see Windows as an unfair encroachment on their innovation in GUI development as implemented on products such as the Lisa and Macintosh. On PCs, Windows is still the most popular operating system. However, in 2014, Microsoft admitted losing the majority of the overall operating system market to Android, because of the massive growth in sales of Android smartphones.
In 2014, the number of Windows devices sold was less than 25 %. This comparison however may not be relevant, as the two operating systems traditionally target different platforms. Still, numbers for server use of Windows show one third market share, similar to that for end user use; as of October 2018, the most recent version of Windows for PCs, tablets and embedded devices is Windows 10. The most recent versions for server computers is Windows Server 2019. A specialized version of Windows runs on the Xbox One video game console. Microsoft, the developer of Windows, has registered several trademarks, each of which denote a family of Windows operating systems that target a specific sector of the computing industry; as of 2014, the following Windows families are being developed: Windows NT: Started as a family of operating systems with Windows NT 3.1, an operating system for server computers and workstations. It now consists of three operating system subfamilies that are released at the same time and share the same kernel: Windows: The operating system for mainstream personal computers and smartphones.
The latest version is Windows 10. The main competitor of this family is macOS by Apple for personal computers and Android for mobile devices. Windows Server: The operating system for server computers; the latest version is Windows Server 2019. Unlike its client sibling, it has adopted a strong naming scheme; the main competitor of this family is Linux. Windows PE: A lightweight version of its Windows sibling, meant to operate as a live operating system, used for installing Windows on bare-metal computers, recovery or troubleshooting purposes; the latest version is Windows PE 10. Windows IoT: Initially, Microsoft developed Windows CE as a general-purpose operating system for every device, too resource-limited to be called a full-fledged computer. However, Windows CE was renamed Windows Embedded Compact and was folded under Windows Compact trademark which consists of Windows Embedded Industry, Windows Embedded Professional, Windows Embedded Standard, Windows Embedded Handheld and Windows Embedded Automotive.
The following Windows families are no longer being developed: Windows 9x: An operating system that targeted consumers market. Discontinued because of suboptimal performance. Microsoft now caters to the consumer market with Windows NT. Windows Mobile: The predecessor to Windows Phone, it was a mobile phone operating system; the first version was called Pocket PC 2000. The last version is Windows Mobile 6.5. Windows Phone: An operating system sold only to manufacturers of smartphones; the first version was Windows Phone 7, followed by Windows Phone 8, the last version Windows Phone 8.1. It was succeeded by Windows 10 Mobile; the term Windows collectively describes any or all of several generations of Microsoft operating system products. These products are categorized as follows: The history of Windows dates back to 1981, when Microsoft started work on a program called "Interface Manager", it was announced in November 1983 under the name "Windows", but Windows 1.0 was not released until November 1985.
Windows 1.0 was to achieved little popularity. Windows 1.0 is not a complete operating system. The shell of Windows 1.0 is a program known as the MS-DOS Executive. Components included Calculator, Cardfile, Clipboard viewer, Control Panel, Paint, Reversi and Write. Windows 1.0 does not allow overlapping windows. Instead all windows are tiled. Only modal dialog boxes may appear over other windows. Microsoft sold as included Windows Development libraries with the C development environment, which included numerous windows samples. Windows 2.0 was released in December 1987, was more popular than its predecessor. It features several improvements to the user memory management. Windows 2.03 changed the OS from tiled windows to overlapping windows. The result of this change led to Apple Computer filing a suit against Microsoft alleging infringement on Apple's copyrights. Windows 2.0
Galaga, pronounced, is a Japanese arcade game developed and published by Namco Japan and by Midway in North America in 1981. It is the sequel to 1979's Galaxian; the gameplay of Galaga puts the player in control of a spacecraft, situated at the bottom of the screen, with enemy aliens arriving in formation at the beginning of a stage, either trying to destroy, collide with, or capture the spaceship, with the player progressing every time alien forces are vanquished. Galaga is one of the most commercially successful games from the golden age of arcade video games; the arcade version of it has been ported to many consoles, it has had several sequels. In 2011, the game celebrated its 30th anniversary with the release of Galaga 30th Collection for iOS; the objective of Galaga is to score as many points as possible by destroying insect-like enemies. The player controls a starfighter that can move right along the bottom of the playfield. Enemies swarm in groups in a formation near the top of the screen, begin flying down toward the player, firing bullets at and attempting to crash into them.
In stages, some enemies break from an entering group in a frantic attempt to crash into the player. The game ends when the player's last fighter is lost by colliding with an enemy, being hit by an enemy shot, or being captured. Galaga introduces new features from Galaxian. Among these are the ability for two player shots to exist on-screen at once rather than one, a "hit/miss ratio" statistic at the end of the game, a bonus "Challenging Stage" that occurs at Stage 3 and every fourth stage thereafter, in which a series of 40 enemies fly onto and off the screen, 8 at a time, moving in set patterns without firing at the player's ship or trying to crash into it; when you destroy a group of enemies, you are awarded 1K-3K pts. These stages award a 10K-point bonus if the player manages to destroy every enemy, but otherwise 100 bonus points for every enemy destroyed. Another feature in the game is for enemies to randomly transform and organize into a certain formation, which awards the player bonus points if they manage to destroy all three, from levels 4 on, repeating every 256 levels.
Another gameplay feature new to Galaga is the ability for enemies to capture the player's fighter. While the player is in control of just one fighter, a "boss" Galaga will periodically attempt to capture the fighter using a tractor beam. If successful, the fighter joins the enemy formation as a satellite to the boss Galaga which captured it; the captive fighter becomes an enemy, turns red, it can be shot and destroyed, awarding the player 1K points on its destruction. The player can still fire while being captured up to the point their ship "touches" the captor, which could be considered an opportunity to shoot the captor down before it can manage to capture the player. Captive fighters can be freed by destroying the boss Galaga towing it; the freed fighter will combine with the player's fighter who freed them and form a Dual Fighter, offering doubled firepower but with the disadvantage of a target twice as large. If the player destroys the captor while it is still in formation, the captured fighter will not be rescued, will instead fly away after a diving run to appear in the next stage as a satellite for another boss Galaga where it can again be rescued.
A small section in the middle of the Dual Fighter is immune to enemy fire. The default setting for extra lives awards them at scores of 20K, 70K, every multiple of 70K, though other settings can be used. However, no matter the settings, after turning over at 1,000,000 points, no more extra lives are awarded. Additionally, the 2nd player may have up to 8-digit scores; the high score display, maxes out at six digits. Galaga has an exploitable bug that can cause the attackers to randomly stop firing shots at the player. In addition, similar to the Split-Screen Level in Pac-Man, a bug exists in Galaga in which the game "rolls over" from Stage 255 to Stage 0. Depending on the difficulty setting of the machine, this can cause the game to stall, requiring that the machine be reset or power-cycled in order to start a new game. Galaga contains a bug that allows the player to control the spacecraft during the game's attract mode; the original arcade version of Galaga has been ported to: Atari 7800 Famicom Disk System MSX Famicom/NES SG-1000 casio pv2000 Gaplus Galaga'88 Galaga'90 Galaxian³ Attack of the Zolgear Galaga Legions Galaga Special Edition Galaga Legions DX Galaga 3D Impact Galaga: TEKKEN Edition Galaga Assault Galaga Wars Galaga Revenge Virtual Console: Famicom/NES port released in North America on April 9, 2007 for the Wii, on March 13, 2014 for the Nintendo 3DS and on August 15, 2013 for the Wii U.
Xbox Live Arcade—released July 26, 2006 iOS —released March 31, 2009 Nintendo 3DS: As part of the retail title Pac-Man & Galaga Dimensions.
Shooter games are a subgenre of action video game, which test the player's speed and reaction time. It includes many subgenres that have the commonality of focusing on the actions of the avatar using some sort of weapons; this weapon is a gun or some other long-range weapon. A common resource found in many shooter games is ammunition. Most the purpose of a shooter game is to shoot opponents and proceed through missions without the player character being killed or dying. A shooting game is a genre of video game where the player has limited spatial control of his or her character, the focus is entirely on the defeat of the character's enemies using weaponry. Shoot'em ups are a specific subgenre of shooters wherein the player may move up and down and left and right around the screen firing straight forward. Shoot'em ups share common gameplay, but are categorized by viewpoint; this includes fixed shooters such as Space Invaders and Galaxian. This genre includes "run and gun" games which emphasize greater maneuvering or jumping, such as Thexder and Metal Slug.
Shooting gallery games include light gun games, although many can be played using a regular joypad and an on-screen cursor to signify where the bullets are being aimed. When these debuted, they were played from a first-person perspective, with enemy fire that occurred anywhere on the screen damaging or killing the player; as they evolved away from the use of light guns, the player came to be represented by an on-screen avatar someone on the bottom of the screen, who could move and avoid enemy attacks while returning fire. These sorts of shooters always utilize horizontal scrolling to the right to indicate level progression, with enemies appearing in waves from predestined locations in the background or from the sides. One of the earliest examples is the 1985 arcade game Shootout produced by Data East. A specific subgenre of this type of game is the Cabal shooter, named for the game Cabal, in which the player controls an on-screen avatar that can run and jump around the screen in addition to being able to aim their gun.
Other games in this subgenre include Blood Bros. Dynamite Duke, NAM-1975, Wild Guns, Sin and Punishment; as light gun games became more prevalent and started to make use of 3D backgrounds, such as the Time Crisis or House of the Dead series, these sorts of games fell out of popular production, but many like Blood Bros. still have their fanbase today. Other notable games of this category include Laser Invasion. Light gun shooters are shooting gallery games that use a pointing device for computers and a control device for arcade and video games; the first light guns appeared following the development of light-sensing vacuum tubes. It was not long before the technology began appearing in arcade shooting games, beginning with the Seeburg Ray-O-Lite in 1936; these early light gun games used small targets onto. If the beam struck the target, a "hit" was scored. Modern screen-based light guns work on the opposite principle—the sensor is built into the gun itself, the on-screen target emit light rather than the gun.
The first light gun of this type was used on the MIT Whirlwind computer, which used a similar light pen. Like rail shooters, movement is limited in light-gun games. Notable games of this category include the 1974 and 1984 versions of Wild Gunman, Duck Hunt for the NES, the Virtua Cop series, Time Crisis series, House of the Dead series, Resident Evil: The Umbrella Chronicles & Darkside Chronicles. First-person shooters are characterized by an on-screen view that simulates the in-game character's point of view. While many rail shooters and light-gun shooters use a first-person perspective, they are not included in this category. Notable examples of the genre include Doom, Half-Life, Counter-Strike, GoldenEye 007, Medal of Honor, Call of Duty, TimeSplitters, Team Fortress 2 and Halo. Third-person shooters are characterized by a third-person camera view that displays the player character in his/her surroundings. Notable examples of the genre include the Tomb Raider series, Syphon Filter, Max Payne, SOCOM, Star Wars: Battlefront, Resident Evil 4, Gears of War, Splatoon.
Third person shooter mechanics are incorporated into open-world adventure and sandbox games, including the Elder Scrolls series and the Grand Theft Auto franchise. Hero shooters are a variation of multiplayer first- or third-person arena-based shooters, where players, split among two or more teams, select from pre-designed "hero" characters that each possess unique attributes, skills and other activated abilities. Hero shooters encourage teamwork between players on a team, guiding players to select effective combinations of hero characters and coordinate the use of hero abilities during a match; such games are inspired by multiplayer online battle arena games. A popular hero shooter is Team
Facebook, Inc. is an American online social media and social networking service company. It is based in California, it was founded by Mark Zuckerberg, along with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes. It is considered one of the Big Four technology companies along with Amazon and Google; the founders limited the website's membership to Harvard students and subsequently Columbia and Yale students. Membership was expanded to the remaining Ivy League schools, MIT, higher education institutions in the Boston area. Facebook added support for students at various other universities, to high school students. Since 2006, anyone who claims to be at least 13 years old has been allowed to become a registered user of Facebook, though variations exist in this requirement, depending on local laws; the name comes from the face book directories given to American university students. Facebook held its initial public offering in February 2012, valuing the company at $104 billion, the largest valuation to date for a newly listed public company.
It began selling stock to the public three months later. Facebook makes most of its revenue from advertisements; the Facebook service can be accessed from devices with Internet connectivity, such as personal computers and smartphones. After registering, users can create a customized profile revealing information about themselves. Users can post text and multimedia of their own devising and share it with other users as "friends". Users can use various embedded apps, receive notifications of their friends' activities. Users may join common-interest groups. Facebook had more than 2.3 billion monthly active users as of December 2018. It receives prominent media coverage, including many controversies such as user privacy and psychological effects; the company has faced intense pressure over censorship and over content that some users find objectionable. Facebook offers other services, it independently developed Facebook Messenger. Zuckerberg built; the site was comparable to Hot or Not and used "photos compiled from the online facebooks of nine Houses, placing two next to each other at a time and asking users to choose the "hotter" person".
Facemash attracted 22,000 photo-views in its first four hours. The site was sent to several campus group list-servers, but was shut down a few days by Harvard administration. Zuckerberg faced expulsion and was charged with breaching security, violating copyrights and violating individual privacy; the charges were dropped. Zuckerberg expanded on this project that semester by creating a social study tool ahead of an art history final exam, he uploaded all art images to a website, each of, accompanied by a comments section shared the site with his classmates. A "face book" is a student directory featuring personal information. In 2003, Harvard had only a paper version along with private online directories. Zuckerberg told the Crimson, "Everyone's been talking a lot about a universal face book within Harvard.... I think. I can do it better than they can, I can do it in a week." In January 2004, Zuckerberg coded a new website, known as "TheFacebook", inspired by a Crimson editorial about Facemash, stating, "It is clear that the technology needed to create a centralized Website is available... the benefits are many."
Zuckerberg met with Harvard student Eduardo Saverin, each of them agreed to invest $1,000 in the site. On February 4, 2004, Zuckerberg launched "TheFacebook" located at thefacebook.com. Six days after the site launched, Harvard seniors Cameron Winklevoss, Tyler Winklevoss, Divya Narendra accused Zuckerberg of intentionally misleading them into believing that he would help them build a social network called HarvardConnection.com. They claimed; the three complained to the Crimson and the newspaper began an investigation. They sued Zuckerberg, settling in 2008 for 1.2 million shares. Membership was restricted to students of Harvard College. Within a month, more than half the undergraduates had registered. Dustin Moskovitz, Andrew McCollum, Chris Hughes joined Zuckerberg to help manage the growth of the website. In March 2004, Facebook expanded to Columbia and Yale. and to all Ivy League colleges, Boston University, New York University, MIT, Washington and successively most universities in the United States and Canada.
In mid-2004, Napster co-founder and entrepreneur Sean Parker—an informal advisor to Zuckerberg—became company president. In June 2004, the company moved to California, it received its first investment that month from PayPal co-founder Peter Thiel. In 2005, the company dropped "the" from its name after purchasing the domain name facebook.com for US$200,000. The domain had belonged to AboutFace Corporation. In May 2005, Accel Partners invested $12.7 million in Facebook, Jim Breyer added $1 million of his own money. A high-school version of the site launched in September 2005. Eligibility expanded to include employees including Apple Inc. and Microsoft. On September 26, 2006, Facebook opened to everyone at least 13 years old with a valid email address. By late 2007, Facebook had 100,000 pages. Organization pages began rolling out in May 2009. On October 24, 2007, Microsoft announced th
MacOS is a series of graphical operating systems developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac family of computers. Within the market of desktop and home computers, by web usage, it is the second most used desktop OS, after Microsoft Windows.macOS is the second major series of Macintosh operating systems. The first is colloquially called the "classic" Mac OS, introduced in 1984, the final release of, Mac OS 9 in 1999; the first desktop version, Mac OS X 10.0, was released in March 2001, with its first update, 10.1, arriving that year. After this, Apple began naming its releases after big cats, which lasted until OS X 10.8 Mountain Lion. Since OS X 10.9 Mavericks, releases have been named after locations in California. Apple shortened the name to "OS X" in 2012 and changed it to "macOS" in 2016, adopting the nomenclature that they were using for their other operating systems, iOS, watchOS, tvOS; the latest version is macOS Mojave, publicly released in September 2018.
Between 1999 and 2009, Apple sold. The initial version, Mac OS X Server 1.0, was released in 1999 with a user interface similar to Mac OS 8.5. After this, new versions were introduced concurrently with the desktop version of Mac OS X. Beginning with Mac OS X 10.7 Lion, the server functions were made available as a separate package on the Mac App Store.macOS is based on technologies developed between 1985 and 1997 at NeXT, a company that Apple co-founder Steve Jobs created after leaving the company. The "X" in Mac OS X and OS X is pronounced as such; the X was a prominent part of the operating system's brand identity and marketing in its early years, but receded in prominence since the release of Snow Leopard in 2009. UNIX 03 certification was achieved for the Intel version of Mac OS X 10.5 Leopard and all releases from Mac OS X 10.6 Snow Leopard up to the current version have UNIX 03 certification. MacOS shares its Unix-based core, named Darwin, many of its frameworks with iOS, tvOS and watchOS.
A modified version of Mac OS X 10.4 Tiger was used for the first-generation Apple TV. Releases of Mac OS X from 1999 to 2005 ran on the PowerPC-based Macs of that period. After Apple announced that they were switching to Intel CPUs from 2006 onwards, versions were released for 32-bit and 64-bit Intel-based Macs. Versions from Mac OS X 10.7 Lion run on 64-bit Intel CPUs, in contrast to the ARM architecture used on iOS and watchOS devices, do not support PowerPC applications. The heritage of what would become macOS had originated at NeXT, a company founded by Steve Jobs following his departure from Apple in 1985. There, the Unix-like NeXTSTEP operating system was developed, launched in 1989; the kernel of NeXTSTEP is based upon the Mach kernel, developed at Carnegie Mellon University, with additional kernel layers and low-level user space code derived from parts of BSD. Its graphical user interface was built on top of an object-oriented GUI toolkit using the Objective-C programming language. Throughout the early 1990s, Apple had tried to create a "next-generation" OS to succeed its classic Mac OS through the Taligent and Gershwin projects, but all of them were abandoned.
This led Apple to purchase NeXT in 1996, allowing NeXTSTEP called OPENSTEP, to serve as the basis for Apple's next generation operating system. This purchase led to Steve Jobs returning to Apple as an interim, the permanent CEO, shepherding the transformation of the programmer-friendly OPENSTEP into a system that would be adopted by Apple's primary market of home users and creative professionals; the project was first code named "Rhapsody" and officially named Mac OS X. Mac OS X was presented as the tenth major version of Apple's operating system for Macintosh computers. Previous Macintosh operating systems were named using Arabic numerals, as with Mac OS 8 and Mac OS 9; the letter "X" in Mac OS X's name refers to a Roman numeral. It is therefore pronounced "ten" in this context. However, it is commonly pronounced like the letter "X"; the first version of Mac OS X, Mac OS X Server 1.0, was a transitional product, featuring an interface resembling the classic Mac OS, though it was not compatible with software designed for the older system.
Consumer releases of Mac OS X included more backward compatibility. Mac OS applications could be rewritten to run natively via the Carbon API; the consumer version of Mac OS X was launched in 2001 with Mac OS X 10.0. Reviews were variable, with extensive praise for its sophisticated, glossy Aqua interface but criticizing it for sluggish performance. With Apple's popularity at a low, the makers of several classic Mac applications such as FrameMaker and PageMaker declined to develop new versions of their software for Mac OS X. Ars Technica columnist John Siracusa, who reviewed every major OS X release up to 10.10, described the early releases in retrospect as'dog-slow, feature poor' and Aqua as'unbearably slow and a huge resource hog'. Apple developed several new releases of Mac OS X. Siracusa's review of version 10.3, noted "It's strange to have gone from years of uncertainty and vaporware to a steady annual supply of major new operating system releases." Version 10.4, Tiger shocked executives at Microsoft by offering a number of features, such as fast file s