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Model M
Model M keyboards are 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 different variations have their own distinct characteristics, with the vast majority having a buckling-spring key design and uniform profile, swappable keycaps. Model M keyboards are notable among computer enthusiasts and frequent typists due to their durability, typing-feel consistency, and their tactile and auditory feedback. The popularity of the IBM PC and its successors made the Model M's design 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 classic and durable piece of hardware. Although the computers and computer peripherals produced concurrently with them ... [...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, as well as the Series/1 minicomputer. 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 contro ... [...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 Printed circuit board, 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 Milli, mNewton_(unit), N, a crisper feel, and loud ... [...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: Ninestar (formerly Apex Technology), PAG Asia Capital, and Legend Capital. On December 23, 2024, it was announced that Xerox will acquire Lexmark for $1.5 billion. 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 (under NYSE:LXK). 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 taken private and acquired ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Menu Key
In computing, the menu key (), or application key, is a key with the primary function to launch a context menu with the keyboard rather than with the usual right-mouse button. It was previously found on Microsoft Windows-oriented computer keyboards and was introduced at the same time as the Windows key, Windows logo key. On keyboards including the key, its symbol would usually have been a small icon depicting a pointer (computing WIMP), pointer hovering above a menu; it would typically have been found on the right side of the keyboard between the right Windows key, Windows logo key and the right control key (or between the right AltGr 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 was frequently omitted in the interest of space, particularly on portable and laptop keyboards. It was able to be used when the right-mouse button was not present on a Mouse (computing) ... [...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, wi ... [...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, PS/2 port, and 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 hardware standards previously established by IBM and adopted in the IBM PC compatible industry. Most major PC manufacturers balked at IBM's licensing terms for MCA-compatible hardware, particularly the per-machine royalties. The OS/2 operating system was announced at the same time as the PS/2 line and was intended to be the primary o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalajara
Guadalajara ( ; ) is the capital and the most populous city in the western Mexican List of states of Mexico, state of Jalisco, as well as the most densely populated municipality in Jalisco. According to the 2020 census, the city has a population of 1,385,629 people, making it the 8th most populous city in Mexico, while the Guadalajara metropolitan area has a population of 5,268,642, 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, twenty-second largest metropolitan area in the Americas. Guadalajara has the second-highest population density in Mexico with over 10,361 people per km2, surpassed only by Mexico City. 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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenock
Greenock (; ; , ) is a town in Inverclyde, Scotland, located in the west central Lowlands of Scotland. The town is the administrative centre of Inverclyde Council. It is a former burgh within the historic county of Renfrewshire, and forms part of a contiguous urban area with Gourock to the west and Port Glasgow to the east. The 2011 UK Census showed that Greenock had a population of 44,248, a decrease from the 46,861 recorded in the 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 , dative of , 'a sunny knoll. The Scottish Gaelic place-name is relatively common, with another Greenock near Callander in Menteith (formerly in Perthshire) and yet another at Muirkirk in Kyle, now in East Ayrshire. R. M. Smith in (1921) described the alternative derivation from Common Brittonic *, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lexington, Kentucky
Lexington is a Consolidated city-county, consolidated city coterminous with and the county seat of Fayette County, Kentucky, United States. As of the 2020 United States census, 2020 census the city's population was 322,570, making it the List of cities in Kentucky, second-most populous city in Kentucky (after Louisville, Kentucky, Louisville), the 14th-most populous city in the Southeastern United States, Southeast, and the List of United States cities by population, 59th-most populous city in the United States. By area, it is the country's List of United States cities by area, 33rd-largest city. Lexington is known as the "Horse Capital of the World" due to the hundreds of Equine industry in Kentucky, horse farms in the region, as well as the Kentucky Horse Park, The Red Mile and Keeneland race courses. It is within the state's Bluegrass region. Notable locations within the city include venues Rupp Arena and Central Bank Center, colleges and universities such as the University of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM RS/6000
The RISC System/6000 is a family of RISC-based (Reduced Instruction Set Computer-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 is 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. The RS/6000 floating-point execution unit (FPU) enabled major improvements in the speed and accuracy of floating-point operations. The key feature of the FPU was introducing the MAF (multiply-add fused) operation, which has since become standard in most modern processors. History The first RS/6000 models used the IBM Standard Micro Channel (SMC) bus; later models used PCI. Some later ... [...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 Cathode ray tube, CRT display * 24 lines of 80 characters * Keyboard layout, 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, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VT220
The VT200 series is a family of computer terminals introduced by Digital Equipment Corporation (DEC) in November 1983. The VT220 was the basic version, a text-only version with multi-lingual capabilities. 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 X3.64. 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 $1,295, but later priced 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, Wys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
