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Model M
Model M designates a group of computer keyboards designed and manufactured by IBM starting in 1985, and later by Lexmark International, Maxi Switch, and Unicomp. The keyboard's many variations have their own distinct characteristics, with the vast majority having a buckling-spring key design and swappable keycaps. Model M keyboards have been praised by computer enthusiasts and frequent typists due to their durability and consistency, and the tactile and auditory feedback they provide. The popularity of the IBM PC and its successors made the Model M's design tremendously influential. Almost all later general-purpose computer keyboards mimicked its key layout and other aspects of its ergonomics. The layout was standardized by ISO in 1994 and ANSI in 1998, with minor additions—most notably the Windows key and Menu key. The Model M is regarded as a timeless and durable piece of hardware. Although the computers and computer peripherals produced concurrently with them are con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VT220
The VT220 is a computer terminal introduced by Digital Equipment Corporation (DEC) in November 1983. The VT240 added monochrome ReGIS vector graphics support to the base model, while the VT241 did the same in color. The 200 series replaced the successful VT100 series, providing more functionality in a much smaller unit with a much smaller and lighter keyboard. Like the VT100, the VT200 series implemented a large subset of ANSI X.364. Among its major upgrades was a number of international character sets, as well as the ability to define new character sets. The VT200 series was extremely successful in the market. Released at $795, the VT220 offered features, packaging and price that no other serial terminal could compete with at the time. In 1986, DEC shipped 165,000 units, giving them a 42% market share, double that of the closest competitor, Wyse. Competitors adapted by introducing similar models at lower prices, leading DEC to do the same by releasing the less-expensive $545 V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 5250
IBM 5250 is a family of block-oriented terminals originally introduced with the IBM System/34 midrange computer systems in 1977. It also connects to the later System/36, System/38, and IBM AS/400 systems, and to IBM Power Systems systems running IBM i. Components 5250 devices can be directly attached to the host or communicate remotely using Synchronous Data Link Control (SDLC) at up to 9600bit/s. Devices can also be clustered or daisy-chained. In 1980 the 5250 system consisted of the following components: * 5251 Display Station. The monochrome text-only display can be either 960 characters, formatted as 12 lines of 80 characters, or 1920 characters as 24 lines of 80 characters. Upper and lower case is standard. Text attributes consist of blink, high intensity, reverse video, non-display, underscore, and a unique ''column separator'' that causes the field to be preceded and followed by a vertical bar. 5251 and 5252 input ''format control'' attributes are optimized for data ent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model F Keyboard
The Model F was a series of computer keyboards produced mainly from 1981–1985 and in reduced volume until 1994 by IBM and later Lexmark. Its mechanical-key design consisted of a buckling spring over a capacitive PCB, similar to the later Model M keyboard that used a membrane in place of the PCB. The Model F first appeared with the IBM System/23 Datamaster all-in-one computer. It is best known as part of the IBM Personal Computer in 1981 with some keycap label differences, and its subsequent release with the IBM Personal Computer/AT, where it was reconfigured with the AT protocol and some layout revisions. After the introduction of the Model M keyboard, production was ramped down and eventually limited to replacement units for existing installations. The capacitive design is widely considered superior to that of the later membrane design used on the Model M. It has a lighter actuation force of about 600 m N, a crisper feel, and louder feedback. It also has a higher MTBF of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lexmark
Lexmark International, Inc. is a privately held American company that manufactures laser printers and imaging products. The company is headquartered in Lexington, Kentucky. Since 2016 it has been jointly owned by a consortium of three multinational companies: Apex Technology, PAG Asia Capital, and Legend Capital. History Lexmark was formed on March 27, 1991 when investment firm Clayton & Dubilier completed a leveraged buyout of IBM Information Products Corporation, the printer, typewriter, and keyboard operations of IBM. Lexmark became a publicly traded company on the New York Stock Exchange on November 15, 1995. By 2016, the company struggled to keep corporate clients that are cutting costs and the consumers who are shifting to mobile devices from personal computers. It was reported in April 2016 that Lexmark would be acquired by Apex Technology and PAG Asia Capital for US$3.6 billion. Lexmark was set to be acquired at $40.50 per share in the transaction. Initial talks for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Menu Key
In computing, the menu key or application key () is a key found on Microsoft Windows-oriented computer keyboards, introduced at the same time as the Windows logo key. Its symbol is usually a small icon depicting a pointer hovering above a menu, and it is typically found on the right side of the keyboard between the right Windows logo key and the right control key (or between the right alt key and the right control key). While the Windows key is present on the vast majority of keyboards intended for use with the Windows operating system, the menu key is frequently omitted in the interest of space, particularly on portable and laptop keyboards. The key's primary function is to launch a context menu with the keyboard rather than with the usual right-mouse button. It can be used when the right-mouse button is not present on a mouse. Some Windows public terminals do not have a Menu key on their keyboard to prevent users from right clicking; however, in many Windows applications, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM Personal Computer/AT
The IBM Personal Computer/AT (model 5170, abbreviated as IBM AT or PC/AT) was released in 1984 as the fourth model in the IBM Personal Computer line, following the IBM PC/XT and its IBM Portable PC variant. It was designed around the Intel 80286 microprocessor. Name IBM did not specify an expanded form of "AT" on the machine, press releases, brochures or documentation, but some sources expand the term as "Advanced Technology", including at least one internal IBM document. History IBM's 1984 introduction of the AT was seen as an unusual move for the company, which typically waited for competitors to release new products before producing its own models. At $4,000–6,000, it was only slightly more expensive than considerably slower IBM models. The announcement surprised rival executives, who admitted that matching IBM's prices would be difficult. No major competitor showed a comparable computer at COMDEX Las Vegas that year. Features The AT is IBM PC compatible, with the mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM Personal System/2
The Personal System/2 or PS/2 is IBM's second generation of personal computers. Released in 1987, it officially replaced the IBM PC, XT, AT, and PC Convertible in IBM's lineup. Many of the PS/2's innovations, such as the 16550 UART (serial port), 1440 KB 3.5-inch floppy disk format, 72-pin SIMMs, the PS/2 port, and the VGA video standard, went on to become standards in the broader PC market. The PS/2 line was created by IBM partly in an attempt to recapture control of the PC market by introducing the advanced yet proprietary Micro Channel architecture (MCA) on higher-end models. These models were in the strange position of being incompatible with the IBM-compatible hardware standards previously established by IBM and adopted in the PC industry. However, IBM's initial PS/2 computers were popular with target market corporate buyers, and by September 1988 IBM reported that it had sold 3 million PS/2 machines. This was only 18 months after the new range had been introduced. Mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalajara
Guadalajara ( , ) is a metropolis in western Mexico and the capital of the list of states of Mexico, state of Jalisco. According to the 2020 census, the city has a population of 1,385,629 people, making it the 7th largest city by population in Mexico, while the Guadalajara metropolitan area has a population of 5,268,642 people, making it the Metropolitan areas of Mexico#List of metropolitan areas in Mexico by population, third-largest metropolitan area in the country and the List of metropolitan areas in the Americas, twentieth largest metropolitan area in the Americas Guadalajara has the second-highest population density in Mexico, with over 10,361 people per square kilometer. Within Mexico, Guadalajara is a center of business, arts and culture, technology and tourism; as well as the economic center of the Bajío region. It usually ranks among the 100 most productive and globally competitive cities in the world. It is home to numerous landmarks, including Guadalajara Cathedral, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenock
Greenock (; sco, Greenock; gd, Grianaig, ) is a town and administrative centre in the Inverclyde council areas of Scotland, council area in Scotland, United Kingdom and a former burgh of barony, burgh within the Counties of Scotland, historic county of Renfrewshire (historic), Renfrewshire, located in the west central Lowlands of Scotland. It forms part of a contiguous urban area with Gourock to the west and Port Glasgow to the east. The United Kingdom Census 2011, 2011 UK Census showed that Greenock had a population of 44,248, a decrease from the 46,861 recorded in the United Kingdom Census 2001, 2001 UK Census. It lies on the south bank of the Clyde at the "Tail of the Bank" where the River Clyde deepens into the Firth of Clyde. History Name Place-name scholar William J. Watson wrote that "Greenock is well known in Gaelic as Grianáig, dative of grianág, a sunny knoll". The Scottish Gaelic place-name ''Grianaig'' is relatively common, with another (Greenock) near Calla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lexington, Kentucky
Lexington is a city in Kentucky, United States that is the county seat of Fayette County, Kentucky, Fayette County. By population, it is the List of cities in Kentucky, second-largest city in Kentucky and List of United States cities by population, 57th-largest city in the United States. By land area, it is the country's List of United States cities by area, 28th-largest city. The city is also known as "Horse Capital of the World". It is within the state's Bluegrass region. Notable locations in the city include the Kentucky Horse Park, The Red Mile and Keeneland race courses, Rupp Arena, Central Bank Center, Transylvania University, the University of Kentucky, and Bluegrass Community and Technical College. As of the 2020 United States census, 2020 census the population was 322,570, anchoring a Lexington-Fayette, KY Metropolitan Statistical Area, metropolitan area of 516,811 people and a Lexington-Fayette-Frankfort-Richmond, KY Combined Statistical Area, combined statistical ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM RS/6000
The RISC System/6000 (RS/6000) is a family of RISC-based Unix servers, workstations and supercomputers made by IBM in the 1990s. The RS/6000 family replaced the IBM RT PC computer platform in February 1990 and was the first computer line to see the use of IBM's POWER and PowerPC based microprocessors. In October 2000, the RS/6000 brand was retired for POWER-based servers and replaced by the eServer pSeries. Workstations continued under the RS/6000 brand until 2002, when new POWER-based workstations were released under the IntelliStation POWER brand. History The first RS/6000 models used the Micro Channel bus, later models used PCI. Some later models conformed to the PReP and CHRP standard platforms, which were co-developed with Apple and Motorola, with Open Firmware. The plan was to enable the RS/6000 to run multiple operating systems such as Windows NT, NetWare, OS/2, Solaris, Taligent, AIX and Mac OS but in the end only IBM's Unix variant AIX was used and supported on RS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 3101
The IBM 3101 ASCII Display Station, and IBM's subsequent products, the 3151/315X and 3161/316X, are display terminals with asynchronous serial communication (start-stop signaling) that were used with a variety of IBM and non-IBM computers during the 1980s–90s, especially the data processing terminals on non-IBM minicomputers, IBM Series/1 and IBM AIX computers. Models IBM 3101 The IBM 3101 ASCII Display Station appeared in 1979. It featured: * 12-inch green-phosphor CRT display * 24 lines of 80 characters * ASCII Keyboard (US English, Belgian, Danish, Finnish, French, German, Italian, Japanese Katakana, Norwegian, Portuguese, Spanish, Swedish, Swiss French, Swiss German, UK English) * Asynchronous communication: EIA RS-232C interface for short distance; EIA RS-422 interface for longer distance * Baud rates of 200/300 to 19,200 (bps) Unusually for IBM's practices at the time, it also: * Utilized various non-IBM technologies * Required initial setup by the user * Consisted of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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