Transistor–transistor logic is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the amplifying function. TTL integrated circuits were used in applications such as computers, industrial controls, test equipment and instrumentation, consumer electronics, synthesizers. Sometimes TTL-compatible logic levels are not associated directly with TTL integrated circuits, for example, they may be used at the inputs and outputs of electronic instruments. After their introduction in integrated circuit form in 1963 by Sylvania, TTL integrated circuits were manufactured by several semiconductor companies; the 7400 series by Texas Instruments became popular. TTL manufacturers offered a wide range of logic gates, flip-flops and other circuits. Variations of the original TTL circuit design offered higher speed or lower power dissipation to allow design optimization. TTL devices were made in ceramic and plastic dual-in-line packages, flat-pack form. TTL chips are now made in surface-mount packages.
TTL became the foundation of other digital electronics. After Very-large-scale integration integrated circuits made multiple-circuit-board processors obsolete, TTL devices still found extensive use as the glue logic interfacing between more densely integrated components. TTL was invented in 1961 by James L. Buie of TRW, which declared it, "particularly suited to the newly developing integrated circuit design technology." The original name for TTL was transistor-coupled transistor logic. The first commercial integrated-circuit TTL devices were manufactured by Sylvania in 1963, called the Sylvania Universal High-Level Logic family; the Sylvania parts were used in the controls of the Phoenix missile. TTL became popular with electronic systems designers after Texas Instruments introduced the 5400 series of ICs, with military temperature range, in 1964 and the 7400 series, specified over a narrower range and with inexpensive plastic packages, in 1966; the Texas Instruments 7400 family became an industry standard.
Compatible parts were made by Motorola, AMD, Intel, Signetics, Siemens, SGS-Thomson, National Semiconductor, many other companies in the Eastern Bloc. Not only did others make compatible TTL parts, but compatible parts were made using many other circuit technologies as well. At least one manufacturer, IBM, produced non-compatible TTL circuits for its own use; the term "TTL" is applied to many successive generations of bipolar logic, with gradual improvements in speed and power consumption over about two decades. The most introduced family 74Fxx is still sold today, was used into the late 90s. 74AS/ALS Advanced Schottky was introduced in 1985. As of 2008, Texas Instruments continues to supply the more general-purpose chips in numerous obsolete technology families, albeit at increased prices. TTL chips integrate no more than a few hundred transistors each. Functions within a single package range from a few logic gates to a microprocessor bit-slice. TTL became important because its low cost made digital techniques economically practical for tasks done by analog methods.
The Kenbak-1, ancestor of the first personal computers, used TTL for its CPU instead of a microprocessor chip, not available in 1971. The Datapoint 2200 from 1970 used TTL components for its CPU and was the basis for the 8008 and the x86 instruction set; the 1973 Xerox Alto and 1981 Star workstations, which introduced the graphical user interface, used TTL circuits integrated at the level of Arithmetic logic units and bitslices, respectively. Most computers used TTL-compatible "glue logic" between larger chips well into the 1990s; until the advent of programmable logic, discrete bipolar logic was used to prototype and emulate microarchitectures under development. TTL inputs are the emitters of bipolar transistors. In the case of NAND inputs, the inputs are the emitters of multiple-emitter transistors, functionally equivalent to multiple transistors where the bases and collectors are tied together; the output is buffered by a common emitter amplifier. Inputs both logical ones; when all the inputs are held at high voltage, the base–emitter junctions of the multiple-emitter transistor are reverse-biased.
Unlike DTL, a small “collector” current is drawn by each of the inputs. This is. An constant current flows from the positive rail, through the resistor and into the base of the multiple emitter transistor; this current passes through the base–emitter junction of the output transistor, allowing it to conduct and pulling the output voltage low. An input logical zero. Note that the base–collector junction of the multiple-emitter transistor and the base–emitter junction of the output transistor are in series between the bottom of the resistor and ground. If one input voltage becomes zero, the corresponding base–emitter junction of the multiple-emitter transistor is in parallel with these two junctions. A phenomenon called current steering means that when two voltage-stable elements with different threshold voltages are connected in parallel, the current flows through the path with the smaller threshold voltage; that is, current flows out of this input and into the zero voltage source. As a result, no current flows through t
Zenit is a Russian camera brand manufactured by KMZ in the town of Krasnogorsk near Moscow since 1952 and by BelOMO in Belarus since the 1970s. The Zenit trademark is associated with 35 mm SLR cameras. Among related brands are Zorki for 35 mm rangefinder cameras and Iskra for medium-format folding cameras and Horizon for panoramic cameras. In the 1960s and 1970s, they were exported by Mashpriborintorg to 74 countries; the name is sometimes spelled Zenith in English, such as the manuals published by the UK Zenit-importer TOE. However, TOE's imported camera bodies as from 1963 retained the "Zenit" badges; the early Zorki-based models before that time were labelled "Zenith" in a handwritten style of script. During the 2018 Photokina expo, Zenit announced that it was resuming camera and lens production for the M-mount, as well as for unspecified Nikon and Canon mounts in 2019; the digital Zenit M camera was released in a limited edition set with the Zenitar-M 35mm F/1.0 lens. The camera was produced in partnership with Leica, the digital components derived to some extent from the full-frame Leica M series.
The edition comprised 500 units: fifty units with a black finish and 450 in silver. Russian firmware drives the camera, the chassis was designed in Krasnogorsk. Two further M-mount Zenitar lenses are set for release circa March 2019: the Zenitar-M 21mm F/2.8 and the Zenitar-M 50mm F/1.0. A second digital camera of an new design is planned for release by 2020; this camera will make use of a different lens line. The above Zenit was based on the Zorki rangefinder camera. In transforming the Zorki into an SLR, the simplest approach was taken: the rangefinder housing was removed from the top and replaced by a plain ground-glass screen and prism. During the first years of production Zenit camera development coincided with that of the Zorki cameras; the Zenit-S had PC-synchro for external flash units and the Zenit-3M had an RF-sibling, the Zorki-6. For an SLR, the Pentaprism of all classical Zenits was undersize, with the viewfinder showing about two-thirds of the actual frame-size. During 1967 through 1969 KMZ built an automatic die-cast moulding line, allowing mass camera production.
Camera production switched to the M42×1 thread and an instant-return mirror was developed. This led to one of the most famous Zenits — Zenit-E which saw over 12 million produced. A heavy and tough camera with a mechanism, of exceedingly simple design along the lines of "what isn't there, can't go wrong". Automatic diaphragm functionality was not available until the introduction of the Zenit-EM, which used a direct mechanism linking the shutter release button to the aperture mechanism increasing the effort required to release the shutter. Production included both M39 × 1 and M42 × 1 mounts for the Zenit Zenit B models. Models were only produced in the M42×1 with the Pentax K mount available for the latest models. Towards the end of the 20th century, the Zenit-E heritage became an obstacle to the development of more modern Zenit models; this was because all low-end Zenits until the recent 412DX have been based on the Zenit-E die-cast chassis, complying with the local philosophy that a crude but affordable camera was better than no camera.
The major events of the further development of Zenit-E line was: Introduction of an automatic'jumping' diaphragm on the Zenit-EM TTL metering system on the Zenit-TTL Switching to the Pentax K mount — Zenit-122K DX-code introduction — Zenit-412DXThe Zenit-E was sold with the Moscow 1980 Olympics emblem. The first attempt to make high-end professional camera by KMZ was the Start in 1958; this camera had a full set of shutter speeds, a lens with an automatic diaphragm in a unique breech-lock mount, a knife for cutting-off part of the unexposed film. The photographer could choose between waist-level finders; the grave disadvantage of the Start is blamed on lack of lenses. With the success of the Zeiss-Ikon Contaflex of the mid-50's and its follow-ups in form of the Bessamatic, Retina- and Paxette-reflex, Zenit's next attempt was the Zenit-4, -5 and -6 cameras; these were based on a Voigtländer Bessamatic-type mount with Compur-type iris-shutter near the lens elements. The poor durability and high manufacturing cost of this concept in contrast to the classical barebone Zenit design based on ultimate simplicity showed KMZ to have taken a wrong track: Nevertheless, the Zenit-5 was the first Soviet motor-driven SLR camera, the first Soviet zoom lens featured in the Zenit-6.
Following this, there were two more attempts to make high-end photographic equipment, namely the Zenit-7 and Zenit-D. Both were based on the new cloth-curtain shutter construction; the Zenit-D had automatic exposure mode. Its shutter was sped up to achieve X-sync at 1/125; each of these had its own bayonet mount. There were plans to develop a full line of optics for these cameras but the new shutter was too complicated and unreliable. Production was cancelled shortly after, the only lens made for new mounts were the standard types; the Start, Zenit-7
Absolute First Album
Absolute First Album is the debut studio album by South Korean girl group T-ara. It was released on November 2009, through Core Contents Media. T-ara sought to showcase "two different charms" through Absolute First Album, one embracing a "trendy" image and the other leaning towards a "classic" aesthetic; the result is a modern dance record with traces of retro influences. Absolute First Album features contributions by Shinsadong Tiger, Cho Young-soo, Choi Kyu-sung, Wheesung and "Hitman" Bang; the album was preceded by the hit single "TTL", with its two lead tracks, "Bo Peep Bo Peep" and "Like the First Time", becoming commercial successes as well. "Bo Peep Bo Peep" was a breakthrough single for T-ara, further attaining recognition as one of their signature songs. Absolute First Album has received positive reviews; the success of Absolute First Album lead to T-ara's newcomer wins at the Golden Disc and Seoul Music Awards. The album was re-released as Breaking Heart on February 23, 2010, spawning "You Drive Me Crazy" which became T-ara's first number-one single.
The reissue was nominated for Popularity Award at the Golden Disc Awards. T-ara was formed by Core Contents Media CEO Kim Kwang-soo, prior to commencing their activities as a sextet, two members bowed out after contributing a song to the Cinderella Man soundtrack, citing creative differences; the label brought in three new members and released their debut single "Lie" on July 27, 2009. The song was composed by Cho Young-soo. T-ara's debut was made amid an influx of girl groups on the Korean pop music scene, a writer for weekly magazine SisaIN remarked that the old-school trot influence of "Lie" did little to appeal to core consumers of the girl group market. E. S. and Fin. K. L; the group utilized a "pure" image during its run. T-ara would find wider success with their Supernova collaboration "TTL", a track influenced by southern hip hop; the single was marketed as a "180-degree transformation" of the group, who took on a "sexier" image compared to their debut. In October 2009, the group revealed their plans for a mini-album release in the coming months.
Expanding into a full-length studio album, Absolute First Album was formally announced days prior to its late November release. Core Contents Media brought on "Hitman" Bang to produce songs for the album; the marketing for Absolute First Album revolved around its dual concepts. Absolute First Album was digitally released on November 27, 2009. A physical release followed on December 4, 2009. Upon the album's release, Core Contents Media conducted an online poll in order to determine which lead single to promote first. Nearly 9,000 respondents from Melon and Soribada, among others, were given the choice between "Bo Peep Bo Peep" and "Like the First Time", the latter of which won the poll by 53 percent. However, management proceeded with promotions for "Bo Peep Bo Peep" as the label intended to present a "180-degree transformation" of T-ara's image; the group began performing on Korea's televised music programs with the December 4, 2009, broadcast of Music Bank. "Like the First Time" was subsequently promoted in January 2010, yet their appearances ceased as main vocalist So-yeon contracted H1N1, as did promotions for Absolute First Album as a whole.
Absolute First Album is a dance-pop and electronic record. Member So-yeon remarked that though "idol music the latest trend", adult listeners would be "at ease" with songs such as "Like the First Time", "Apple is A" or "You You You", as they have ppong melodies that "stimulate emotion", its lead single, "Bo Peep Bo Peep", is billed as a "trendy" dance song with a "funky" rhythm. The song is one of several that feature repetitive hooks, including "Tic Tic Toc"; the album dips into "retro" territory as evident on "Lie", derived from trot, "Like the First Time", which employs 1980s influences. T-ara sings in falsetto on the latter track, parts of its electronic production is "reminiscent" of Aphex Twin and Humming Urban Stereo. Furthermore, "Like the First Time" has been compared to "In for the Kill" by English synthpop act La Roux."You Drive Me Crazy", from the Breaking Heart re-issue, is an "edgy" electropop song which has received comparisons to "If U Seek Amy" by American singer Britney Spears.
It has been called a "song without breaks" and is highlighted for the "important key role" that synthesizers play in "creating a hook song". Elsewhere, T-ara explores R&B on "Falling U", southern hip hop on "TTL", house music on "TTL Listen 2". Absolute First Album collects each T-ara single prior to its release, though they were not utilized to promote the album directly. "Lie" was released on July 27, 2009, as a maxi single containing four tracks: "Lie" and "Lie", a ballad rendition of "Lie", "Wanna Play?". The songs were re-titled for inclusion with "Lie" omitted completely. A music video was produced for each song: in "Lie", the members are coupled with actor Yoo Seung-ho. "Lie" was used to promote the MBC horror series Soul. Actress Lim Ju-eun r
Taiwan Tobacco and Liquor Corporation
Taiwan Tobacco and Liquor Corporation is a state-owned manufacturer and distributor of cigarettes and alcohol in Taiwan. Its most famous product is Taiwan Beer. Other products include wine, Japanese-style liqueurs, Chinese herb liqueurs, various distilled spirits. TTL was established as a government agency during Japanese colonial rule and was renamed the Taiwan Tobacco and Wine Monopoly Bureau in 1947. Between 1947 and 1968 the Bureau exercised a monopoly over all alcohol and camphor products sold in Taiwan, it retained tobacco and alcohol monopolies until Taiwan's entry into the WTO in 2002. TTL sponsors the Taiwan Beer of Super Basketball League; the company today known as TTL had its origins in a government agency established by Taiwan's Japanese rulers in 1901. The Monopoly Bureau of the Taiwan Governor's Office Chinese: 臺灣總督府專賣局 was responsible for all liquor and tobacco products in Taiwan as well as opium and camphor; the Bureau began brewing Takasago Beer in 1922 through the Takasago Malted Beer Company.
Light and dark varieties were offered, though the price of Takasago Beer varied over the course of its manufacture depending on the availability of imported Japanese beers and the contingencies of the economy. As World War II reached its conclusion in the 1940s matches and standard weights and measures came under the Monopoly Bureau's authority. After the war, the incoming Chinese Nationalists preserved the monopoly system for alcohol and tobacco. Production of beer was assigned in 1945 to the Taiwan Provincial Monopoly Bureau. Takasago Beer was renamed Taiwan Beer in 1946; the following year, production of Taiwan Beer was assigned to the Taiwan Tobacco and Wine Monopoly Bureau. In the 1960s locally produced Formosa rice was added to the fermentation process, resulting in the distinctive local flavour for which the beer is known today. Taiwan entered its modern period of pluralistic democracy in the 1990s. Laws went into force in 2002 as Taiwan prepared for admission to the World Trade Organization that opened the Taiwan market to competing products.
In 2002 the Monopoly Bureau gave way to the Taiwan Tobacco and Liquor Corporation. Since coming into existence TTL has introduced four new Taiwan Beer brews: Gold Medal, Mine Amber and Mine Dark. Taiwan Beer remains the island's best-selling brew and is one of the most recognized brands in Taiwan's business world. In 2018, Taiwan Tobacco and Liquor Corporation introduced whiskey known as Omar. Taiwan Beer is mass-produced at the Wuri Beer Factory in Taichung City, it is brewed on site at the Taiwan Beer Bar in Taipei. Taiwan Beer is the main brand of the Taiwan Liquor Corporation; the brand, an icon of Taiwanese culture, began as a monopoly product but has remained the best-selling beer on the island in the era of free trade. Taiwan Beer has incorporated locally produced ponlai rice in its recipe since the 1960s, giving the beer a distinctive flavour. Taiwan Beer brews have won international awards, including the International Monde Selection in 1977 and the Brewing Industry International Awards in 2002.
Three lager brews, all amber, are sold under the Taiwan Beer brand name. Original and Gold Medal, introduced in April 2003, are 4.5% abv and have a wide domestic distribution. The newest lager, appears most in bars and restaurants, where it is available on tap or in its signature solid green bottle. Designed to be sold fresh, it is seen in stores due to its early expiration date. In 2008 Taiwan Beer began selling malt brews under the Mine label: Mine Dark. Two special variants of Taiwan Beer, Taiwan Black and Taiwan Red, appeared in 2009. TTL marketing strategies include advertisements featuring celebrity endorsements by popular Taiwanese figures such as A-Mei. A basketball team named Taiwan Beer, popularly nicknamed'The Brew Crew,' is sponsored by the company; the Taiwan Beer Bar and Beer Garden is a brewpub in Taipei. The Factory, near the Wujih station of the Taiwan High Speed Rail, is the site of an annual Taiwan Beer Festival held every summer. List of companies of Taiwan Case Study: TsingTao and Taiwan Beer: Trademark Dispute Between Beijing and Taipei Lin, Jackie.
"Beer fight is about politics: TTL." Taipei Times, 2004-07-02. "2008 Taiwan Beer Festival." Taipei Times, 2008-08-01. Taiwan Tobacco and Liquor Corporation - Official Site Taiwan Beer - Ads and Features Review: Taiwan Beer Bar. Taiwan Fun magazine, 2005-08
In photography, through-the-lens metering refers to a feature of cameras whereby the intensity of light reflected from the scene is measured through the lens. In some cameras various TTL metering modes can be selected; this information can be used to set the optimal film or image sensor exposure, it can be used to control the amount of light emitted by a flash unit connected to the camera. Through-the-lens metering is most associated with single-lens reflex cameras. In most film and digital SLRs, the light sensor for exposure metering are incorporated into the pentaprism or pentamirror, the mechanism by which a SLR allows the viewfinder to see directly through the lens; as the mirror is flipped up, no light can reach there during exposure, the necessary amount of exposure needs to be determined before the actual exposure. These light sensors could traditionally be used for ambient light TTL metering only. In newer SLRs as well as in all DSLRs, they can be utilized for preflash TTL metering, where the metering is carried out before the mirror flips up using a small preflash of known intensity and the necessary amount of flash light is extrapolated from the reflected flash light measured by the metering cells in the roof of the camera and is applied during the exposure without any possible real-time feedback.
There were a few sophisticated film SLRs including the Olympus OM-2, the Pentax LX, the Nikon F3, the Minolta 9000, where metering cells located at the bottom of the mirror box were used for ambient light metering, depending on model either instead or in addition to metering cells in the roof of the camera. Depending on model, the light was reflected down there either by a secondary mirror behind the half-transparent main mirror, a special reflective coating of the first shutter curtain, the surface of the film itself, or combinations thereof. One of the advantages of this approach is that the measuring result requires no adjustments when changing focusing screens or viewfinders; some of the cameras using this configuration are immune against measurement errors caused by light reaching the metering cells at larger angles, for example with shift/tilt lenses. Metering cells located at the bottom of the mirror box using light reflected off the film are used in all film SLRs supporting the classical form of real-time TTL flash metering.
Some early Pentax DSLRs could use this same configuration for TTL flash metering as well, but since the reflectance properties of image sensors differ from those of film, this method proved to be unreliable in practice. Therefore, digital SLR cameras don't support any real-time TTL flash metering and must use preflash metering instead; the ambient and flash light metering is carried out by a metering module located in the roof of the camera. Digital SLRs supporting live view or video will use the read out of the image sensor itself for exposure metering in these modes; this applies to Sony's SLT digital cameras, which use the image sensor for exposure metering all the time. Up to the time of this writing, no digital SLR or SLT camera on the market supported any form of real-time TTL flash metering using the image sensor. However, it can be expected that such methods will be introduced as image sensor technology progresses, given the advantages of metering with real-time feedback and without preflash.
TTL metering systems have been incorporated into other types of cameras as well. Most digital "point-and-shoot cameras" use TTL metering, performed by the imaging sensor itself. In many advanced modern cameras multiple'segments' are used to acquire the amount of light in different places of the picture. Depending on the mode the photographer has selected, this information is used to set the exposure. With a simple spot meter, a single spot on the picture is selected; the camera sets the exposure. On some modern SLR systems the spot metering area or zone can be coupled to the actual focusing area selected offering more flexibility and less need to use exposure lock systems. With multiple segment metering, the values of the different segments are combined and weighted to set the correct exposure. Implementations of these metering modes vary between cameras and manufacturers, making it difficult to predict how a scene will be exposed when switching cameras. In the 1970s Olympus marketed the OM-2 camera.
In OTF metering used by Olympus, metering was performed in one of two ways — or a combination of both — depending upon the shutter speed in use. In the OM-2's Auto Dynamic Metering system the first shutter curtain had the lens-facing side coated with a computer generated pattern of white blocks to emulate an average scene; as the mirror flipped-up the metering cell in the base of the mirror box measured the light reflected from the subject bouncing off this pattern of blocks. The timing of the release of the second curtain was adjusted in real time during the actual exposure; as the shutter speed increased, the actual light reflecting off the film surface was measured and the timing of the second curtain's release adjusted accordingly. This gave cameras equipped with this system the ability to adjust to changes in lighting during the actual exposure, useful for specialist applications such as photomicrography and astronomical photography. Leica used a variation of this system, as did Pentax with their Integrated Direct Metering in the LX camera.
A variation of this "OTF" system was used on early
Tourism is travel for pleasure or business. Tourism may be international, or within the traveller's country; the World Tourism Organization defines tourism more in terms which go "beyond the common perception of tourism as being limited to holiday activity only", as people "traveling to and staying in places outside their usual environment for not more than one consecutive year for leisure and not less than 24 hours and other purposes". Tourism can be domestic or international, international tourism has both incoming and outgoing implications on a country's balance of payments. Tourism suffered as a result of a strong economic slowdown of the late-2000s recession, between the second half of 2008 and the end of 2009, the outbreak of the H1N1 influenza virus, but recovered. International tourism receipts grew to US$1.03 trillion in 2005, corresponding to an increase in real terms of 3.8% from 2010. International tourist arrivals surpassed the milestone of 1 billion tourists globally for the first time in 2012, emerging markets such as China and Brazil had increased their spending over the previous decade.
The ITB Berlin is the world's leading tourism trade fair. Global tourism accounts for ca. 8% of global greenhouse gas emissions. The word tourist was used in 1772 and tourism in 1811, it is formed from the word tour, derived from Old English turian, from Old French torner, from Latin tornare. Tourism has become an important source of income for many regions and entire countries; the Manila Declaration on World Tourism of 1980 recognized its importance as "an activity essential to the life of nations because of its direct effects on the social, cultural and economic sectors of national societies and on their international relations."Tourism brings large amounts of income into a local economy in the form of payment for goods and services needed by tourists, accounting as of 2011 for 30% of the world's trade in services, for 6% of overall exports of goods and services. It generates opportunities for employment in the service sector of the economy associated with tourism; the hospitality industries which benefit from tourism include transportation services.
This is in addition to goods bought by tourists, including souvenirs. On the flip-side, tourism can degrade sour relationships between host and guest. In 1936, the League of Nations defined a foreign tourist as "someone traveling abroad for at least twenty-four hours", its successor, the United Nations, amended this definition in 1945, by including a maximum stay of six months. In 1941, Hunziker and Kraft defined tourism as "the sum of the phenomena and relationships arising from the travel and stay of non-residents, insofar as they do not lead to permanent residence and are not connected with any earning activity." In 1976, the Tourism Society of England's definition was: "Tourism is the temporary, short-term movement of people to destinations outside the places where they live and work and their activities during the stay at each destination. It includes movements for all purposes." In 1981, the International Association of Scientific Experts in Tourism defined tourism in terms of particular activities chosen and undertaken outside the home.
In 1994, the United Nations identified three forms of tourism in its Recommendations on Tourism Statistics: Domestic tourism, involving residents of the given country traveling only within this country Inbound tourism, involving non-residents traveling in the given country Outbound tourism, involving residents traveling in another countryThe terms tourism and travel are sometimes used interchangeably. In this context, travel implies a more purposeful journey; the terms tourism and tourist are sometimes used pejoratively, to imply a shallow interest in the cultures or locations visited. By contrast, traveler is used as a sign of distinction; the sociology of tourism has studied the cultural values underpinning these distinctions and their implications for class relations. International tourist arrivals reached 1.035 billion in 2012, up from over 996 million in 2011, 952 million in 2010. In 2011 and 2012, international travel demand continued to recover from the losses resulting from the late-2000s recession, where tourism suffered a strong slowdown from the second half of 2008 through the end of 2009.
After a 5% increase in the first half of 2008, growth in international tourist arrivals moved into negative territory in the second half of 2008, ended up only 2% for the year, compared to a 7% increase in 2007. The negative trend intensified during 2009, exacerbated in some countries due to the outbreak of the H1N1 influenza virus, resulting in a worldwide decline of 4.2% in 2009 to 880 million international tourists arrivals, a 5.7% decline in international tourism receipts. The World Tourism Organization reports the following ten destinations as the most visited in terms of the number of international travelers in 2017. International tourism receipts grew to US$1.26 Trillion in 2015, corresponding to an increase in real terms of 4.4% from 2014. The World Tourism Organization reports the following entities as the top ten tourism earners for the year 2015: The World Tourism Organizati