Model M keyboard
Model M | |
---|---|
The first IBM Model M. This particular unit manufactured in 1986. | |
Part number | Various |
Branding | IBM, Lexmark, Unicomp, others |
Manufacturer | IBM, Lexmark, Maxi Switch, Unicomp |
Product family | IBM Model M |
Layouts | 101/102/104 ANSI, 102/103/105 ISO |
Keyswitches | Buckling-spring, Dome-switch keyboard |
Interface | PS/2, AT, Terminal |
Weight | 2.0–2.5 kg |
Introduced | 1985 |
IBM Model M Sound
The characteristic sound produced by the buckling-spring mechanisms of a Model M keyboard. | |
Problems playing this file? See media help. |
Model M is a designation for a group of computer keyboards manufactured by IBM starting in 1984, and later Lexmark, Unicomp and MaxiSwitch. The many variations of the keyboard 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 while typing.
The Model M is also regarded as a timeless and durable piece of hardware.[1][2][3][4] Although the computers and computer peripherals produced concurrently with the Model M are considered obsolete, many Model M keyboards are still in use, due to their physical durability and the continued validity of their ANSI 101-key layouts. Recently, these keyboards have made a comeback among writers and computer technicians.[5] The Kentucky-based company Unicomp continues to manufacture and sell Model M-style keyboards.[5]
History
The Model M was designed to be a more cost effective keyboard than the Model F keyboards it replaced. Production for the original Model M began in 1985, and the keyboards were often bundled with new IBM computers in the 1980s. These keyboards were produced by IBM in their plants in Lexington, Greenock and Guadalajara. The most common Model M variant is the part number 1391401, which was the US English layout keyboard of the IBM PS/2. Until 1987, the keyboards featured a detachable AT cable; after that, they were bundled with a detachable PS/2 cable. Cables came in both 5- and 10-foot lengths (1.5 and 3 metres). From about 1994 onwards, the majority of Model Ms were manufactured with non-detachable cables to cut down manufacturing costs; however, they retained the 101-key layout, never implementing the Microsoft Windows keys. Unicomp later designed a 104-key Model M including those keys.
On March 27, 1991, IBM divested a number of its hardware manufacturing operations, including keyboard manufacturing, to the investment firm Clayton & Dubilier, Inc. in a leveraged buyout to form Lexmark International Group, Inc.[6][7][8] Lexmark continued manufacturing the Model M keyboard in the United States, United Kingdom, and Mexico with IBM being Lexmark's major customer.[9] Many of the keyboards had IBM assembly part numbers 52G9658, 52G9700, 82G2383, 42H1292, and others. Because of pricing pressures, many of these Model M keyboards were manufactured with a new lower-cost design[10] including lighter-weight plastic, integrated cable, and uniform print color on the keys.
On March 27, 1996, Lexmark's contract to produce keyboards for IBM expired, and Lexmark transitioned its keyboard business to IBM and other vendors.[11] Some of the manufacturing assets were sold to a group of Lexmark employees, who formed Unicomp. The Model M keyboard, similar to part number 42H1292 but first renamed 42H1292U and subsequently the "Customizer", is still in production. A variety of configurations are available from Unicomp, including updated 104- and 105-key layouts; a Linux layout (where the Ctrl and Caps Lock keys and Esc and tilde keys are swapped); models with integrated TrackPoint pointing sticks or integrated trackballs; and POS-specific models, such as those with built-in magstripe readers. When Lexmark discontinued production in March of 1996, IBM continued production in Greenock, Scotland and subcontracted production of the Model M13 keyboard (IBM Enhanced Keyboard with TrackPoint II) to Maxi Switch in Mexico. Production of Model M keyboards by these companies ended in 1999 and 1998 respectively. Although current Unicomp models may still be purchased, original production models retain their value well among collectors and computer enthusiasts.
Variations
Numerous variations of the Model M incorporated alternative features and also colours. One of the most popular variants is the "Space Saving Keyboard" which integrates the number pad into the keyboard's main section, substantially reducing its width. IBM released the regular Model M and Space Saving Keyboard Model M in an alternative 'gray/pebble' colour for use with their industrial computers. Other differences included a grounded spacebar and (sometimes on later models) drainage holes to accommodate harsh environments.
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IBM model M space saving keyboard 'industrial' variant.
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IBM Model M13 'black' variant featuring the optional black trackpoint cap.
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IBM Model M5-2, featuring a purple trackball and alternative 'RGB' keys from unicomp.
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IBM Model M2, Part no. 1395713. Manufactured 1992.
Design
The model people commonly refer to when they mention "Model M" is Part No. 1391401, which was by far the most common. This enhanced keyboard model included the patented buckling spring design[12] and swappable keycaps, as well as the heavy and sturdy design of the Model Ms in general. This keyboard is widely praised as being well-built. Evidence of this can be seen in the fact that keyboard design has changed little in the past twenty years, while the designs of everything from PCs to monitors to mice have changed dramatically. The sturdy design (including heavy steel backplates and a strong plastic frame) of the keyboard allows even the most abused to survive for years. The keyboard's variations (referred to by Part Number, printed on each keyboard's back label) have small differences, while keeping the robust and distinctive key mechanism that makes the boards unique. For example, the 1391472 variant does not have a separate number pad, but it incorporates it into the main key area, as many laptop keyboards do; and the early 1390120 has no LED "lock lights" to indicate the status of the Num Lock, Scroll Lock, and Caps Lock keys.
The Model M's buckling spring key design gives it a unique feel and sound. Unlike more common and cheaper dome switch design, the Model M’s buckling springs give users unmistakable tactile and auditory feedback. Many users report that they can type faster and more accurately on the Model M than on other keyboards.[13]
The Model M is also less susceptible to dirt and wear and tear. While dirt will interfere with proper operation of a dome switch keyboard, the design of a buckling spring keyboard is such that any dirt that falls between the keys is unlikely to enter the switch mechanisms, which are covered by the keys. Even if dirt were to enter a mechanism, a large amount would be necessary to prevent it from operating.
Most Model M's, up until the late 4th-generation variants, have a 1.25" slotted, circular speaker grille molded into their bottom surfaces. Relatively few contain an actual speaker, however, as it was useful only for sounding beep codes on older terminal systems. (The most common Model M variant with a speaker is the 1394540, made for RS/6000 UNIX workstations.)
There are some drawbacks to the Model M design:
- Because they are so large and heavy (over 3 lbs, heavier than some modern laptops) they are not as portable as more modern keyboards.
- Their buckling-spring keys are noisy enough to be inappropriate in quiet locations such as libraries and offices.
- Liquids spilled on most Model M's do not drain out, and remain in the keyboard with potential to cause a short circuit. The later 42H1292 and 59G780 designs, as well as post-1993 1370477s and 1391401s, made mostly by Lexmark and Unicomp, include drainage channels designed to avoid this problem.
- Unicomp currently produces Model M's with USB connectors that can be used directly with modern PCs. However, earlier Model M's have either AT or PS/2 connectors, requiring adapters for use with PCs lacking those capabilities (PS/2-to-USB adapters for computers without PS/2 ports; and additional AT-to-PS/2 adapters, or SDL-to-PS/2 cables, for computers without AT ports). Some PS/2-to-USB adapters are unreliable with early Model M's that require more power than the adapters can provide.[14]
Identification
All Model M keyboards manufactured by either IBM or Lexmark feature an ID label on the underside indicating the assembly part number, individual serial number, and date the keyboard was manufactured. There are other more obvious ways to distinguish between the range, namely the type of badge featured on the top of the keyboard. The first model Ms (part numbers 1390120 or 1390131) featured a square aluminum IBM badge in the top right corner. Part number 1391401 featured an oval, white IBM logo with grey lettering in the top left of the board. The later IBM manufactured keyboards and subsequent Lexmark keyboards of the early 1990s (IBM assembly part numbers 1370477, 52G9658, 52G9700, 59G7980, 92G7453, 82G2383, 42H1292, and others) featured a similar oval badge to part number 1391401, but instead with a grey background and blue lettering.
Features by part number
Part Number | Key Type | Detachable | Interf. | Drainage Channels | Label Type, Position | Maker | Years | Copyright | Miscellaneous Features | |
---|---|---|---|---|---|---|---|---|---|---|
Keycaps | Cable | |||||||||
71U4623 / 1378706 EC 1387530 | Rubber Dome | No | No | PS/2 | Yes | blue IBM and grey label, upper left corner | Lexmark | ?–1995–? | Lexmark International, Inc. 1985 | Swedish QWERTY layout |
1370477 | Buckling spring | No | Yes | PS/2 | Yes | Blue, left corner | Lexmark | ?–1995–? | Lexmark International, Inc. 1984 | |
1370478 | Buckling spring | Yes | Yes | PS/2 | Yes | Blue, left corner | Lexmark | 1993 | Lexmark Int'l. Inc. 1984 | M-5, trackball. Left and right click, and L/R "drag" buttons. |
1397735 | Buckling spring | Yes | Yes | PS/2 | No | Oval, left corner, blank | IBM | ?–1992–? | IBM Corp. 1984 | US 101-key |
1386085 | Buckling spring | Yes | Yes | AT | No | Grey, left corner | IBM | 1988 | IBM Corp. 1984 | English layout. |
1388032 | Buckling spring | Yes | Yes | PS/2 | No{?} | Silver logo on black metal, right corner | IBM | 1985, 1986 | IBM Corp. 1984 | English layout. |
1389979 | Buckling spring | Yes | Yes | AT | No | Silver, right corner | IBM | 1986–87 | IBM Corp. 1984 | Swedish layout; no lock lights |
1390120 | Buckling spring | Yes | Yes | AT or PS/2 | No | Silver, right corner | IBM | 1986–87 | IBM Corp. 1984 | No lock lights |
1390131 | Buckling spring | Yes | Yes | AT or PS/2 | No | Silver, right corner | IBM | 1986–88, 1992–93 | IBM Corp. 1984 | |
1390132 | Buckling spring | Yes | Yes | AT or PS/2 | No | Silver, right corner | IBM | 1986–? | IBM Corp. 1986 | French AZERTY layout |
1390133 | Buckling spring | Yes | Yes | AT or PS/2 | No | Silver, right corner | IBM | ?–1986–87 | IBM Corp. 1984 | German QWERTZ layout |
1390148 | Buckling spring | Yes | Yes | XT | No | Silver, right corner | IBM | ?–1986–87 | IBM Corp. 1984 | German QWERTZ layout; no lock lights |
1390639 | Buckling spring | Yes | No | XT | Yes | Silver, right corner | IBM | ?–1987–? | IBM Corp. 1985 | Spanish QWERTY layout |
1391401 | Buckling spring | Yes | Yes | AT or PS/2 | No (yes 1992 and after) | Grey (Blue 1992 and after), left corner | IBM | 1986–96 | IBM Corp. 1984 | Standard variant on which most 2nd-generation Model M's are based |
1391402 | Buckling spring | Yes | Yes | PS/2 | Yes ? | Grey (Blue 1992? and after), left corner | IBM UK | 1991–96–? | IBM Corp. 1985 | French AZERTY layout |
1391403 | Buckling spring | Yes | Yes (no 1995 and later) | AT or PS/2 | Yes | Grey, left corner and also Blue, left corner | IBM UK, Lexmark International | 1986–97 | IBM Corp./Lexmark International Inc. 1985 | German QWERTZ layout |
1391404 | Buckling spring | Yes | Yes | AT or PS/2 | No | Grey, left corner | IBM UK | 1986–? | IBM Corporation (no year on label) | Italian QWERTY layout |
1393395 | Buckling spring | Yes | Yes | PS/2 | No | Grey, left corner | IBM UK | 1985–? | IBM Corporation 1985 | Italian QWERTY layout |
1391405 | Buckling spring | Yes | Yes | AT or PS/2 | No | Black/Blue, left corner | IBM | 1986–? | IBM Corp. 1985 | Spanish QWERTY layout |
1391406 | Buckling spring | Yes | Yes | AT or PS/2 | No | Grey/blue, left corner | IBM | ≤1985–99 | IBM United Kingdom | UK 102-key variant |
1391407 | Buckling spring | Yes | Yes | PS/2 | Yes | Grey/blue, left corner | IBM | ?–1994–96–? | IBM United Kingdom | Danish/Icelandic 102-key |
1391409 | Buckling spring | Yes | Yes | PS/2 | No | Gray, left corner | IBM | 1987?–94? | IBM Corp. 1985/Lexmark Int. 1985 | Norwegian 102-key |
1391410 | Buckling spring | Yes | Yes | PS/2 (or AT?) | No | Gray, left corner | IBM UK | ?–1992–? | IBM Corp. 1985 | Portuguese 102-key |
1391411 | Buckling spring | Yes | Yes | AT or PS/2 | No | Gray/blue, left corner | IBM UK | ?–1987–97–? | IBM Corp. 1985 | Swedish 102-key |
1391413 | Buckling spring | Yes | Yes | PS/2 | No | Gray, left corner | IBM de Mexico | ?–1989–? | IBM Corp. 1984 | Spanish 102-key |
1391414 | Buckling spring | Yes | Yes | PS/2 | No | Gray, left corner | IBM UK | ?–1996–? | IBM Corp. 1985 | Belgian AZERTY layout |
1391412 | Buckling spring | Yes | Yes | PS/2 | No | Gray, left corner | IBM UK | 1987–96 | IBM Corp. | Swiss French/German QWERTZ layout, 102-key |
1391472 | Buckling spring | Yes | Yes | AT or PS/2 | No | Gray, left corner | IBM | 1987–91 | IBM Corp. 1984 | Space Saving Keyboard (no numeric keypad or lock lights) |
1391506 | Buckling spring | Yes | Yes | PS/2 | No | Gray/blue, left corner and also grey left corner | IBM de Mexico | 1990 | IBM Corp. 1984 | Spanish QWERTY layout |
1391511 | Buckling spring | Yes | Yes | PS/2 | No | Blue, left corner | IBM UK | 1990–93 | IBM Corp. 1985 | Dutch 102-key |
1392565 | Buckling spring | Yes | No | 8P5C (RJ-45) | Yes | Grey, left corner | Lexmark (for IBM) | ?–1995 | Lexmark International, Inc. 1984 | Keyboard for terminals such as IBM 3151. Line drawing characters on the numeric keypad. "Page Up"/"Page Down" replaced with "Clear"/"Erase EOF". Bottom row consists of "Ctrl", "Reset", spacebar, "Ctrl", "Send". |
1392934 | Buckling spring | Yes | Yes | AT or PS/2 | No | Gray, left corner | IBM | ?–1987–90–? | IBM Corp. 1984 | Space Saving Keyboard (no numeric keypad or lock lights) |
1393464 | Buckling spring | Yes | Yes | PS/2 | No{?} | Grey, left corner; some have red "Sabre" logo instead | IBM | ?–1989–92–? | IBM Corp. 1984 | Same as 1391401, with special keycaps for Sabre airline reservation systems |
1393669 | Buckling spring | Yes (no after ????) | Yes (no after 1994) | AT or PS/2 | partial after 1995, yes after ???? | Gray or blue label in left corner, or IBM logo below LEDs | Lexmark UK, IBM UK / Unicomp | 198?–200? | Lexmark International Inc. 1985 / IBM Corp. 1985 / Unicomp 1996 | Slovenian / Croatian (former YU) QWERTZ layout; with or without speaker grille |
1394064 | Buckling spring | Yes | Yes | PS/2 | No | ? | Lexmark | ?–1996–? | Lexmark International, Inc. 1984 | |
1394540 | Buckling spring | Yes | Yes | PS/2 | No | Gray, left corner | IBM | 1990–91? | IBM Corp. 1984 | Made for IBM RS/6000 computer; contains real speaker |
1395217 | Buckling spring | Yes | Yes | AT or PS/2 | No | Gray, left corner | IBM | ?-1989-? | IBM Corp. 1984 | Space Saving Keyboard (no numeric keypad or lock lights) |
1398601 | Buckling Spring | Yes | Yes | AT 5-din or Ps/2 | Yes | Lexmark logo, left corner | Lexmark | ?–1993–? | Lexmark Int'l Inc 1984 | |
1394542 | Buckling spring | Yes | Yes | PS/2 | No | Gray/blue, left corner | IBM UK | 1991–94? | IBM Corp. 1985 | German QWERTZ layout. Made for IBM RS/6000 computer; contains real speaker |
1394545 | Buckling spring | Yes | Yes | PS/2 | No | Gray/Blue, left corner | IBM UK, Lexmark | 1990–96? | IBM Corp. 1985 / Lexmark International Inc. 1985 | Made for IBM RS/6000 computer. Contains real speaker. Swedish/Finnish 102-key QWERTY layout. |
1394957 | Buckling spring | Yes | Yes | PS/2 | Yes | Blue on grey, left corner | IBM UK | 1985–? | IBM Corp. 1985 | Italian QWERTY, dark gray industrial version |
1394958 | Buckling spring | Yes | Yes | PS/2 | Yes | Silver on black, left corner | IBM UK | ?–1998–? | IBM Corp. 1985 | German QWERTZ, dark gray industrial version |
1394966 | Buckling spring | Yes | Yes | PS/2 | ? | Silver on black, left corner | IBM UK | 1992 | IBM Corp. 1985 | Swedish 102-key, dark gray industrial version |
1395300 | Buckling spring | No | No | PS/2 | No | Blue, top right | IBM | 1990–93 | IBM Corp. 1984 | Model M2; Shipped with IBM PS/1 |
1396790 | Buckling spring | Yes | Yes | PS/2 | Yes (no 1991) | Grey (Blue 1992 and after), left corner | IBM | ?–1991–95? | IBM Corp. 1985 | Made in UK by IBM; North American layout |
1397003 | Buckling spring | Yes | Yes | PS/2 | Yes | Blue, top left | IBM | ?–1993–99? | IBM Corp. 1985 | Made in UK by IBM; German QWERTZ; 122 Keys |
1397000 | Buckling spring | Yes | Yes | PS/2 | ? | Blue, top left | Lexmark (for IBM) | ? | Lexmark International, Inc. 1984 | 122-key terminal emulation keyboard: Home/Rule key with arrow keys in a "plus" layout, 24 function keys, 10-key left cluster with terminal commands (Attn, Clear, Pause, ErEOF, etc.) |
1397599 | Buckling spring | Yes | Yes | PS/2 | Yes (1992 and after) | Gray, left corner | IBM | ?–1991–94-? | IBM Corp. 1984 | Similar to 1391401 but with metal stabilizer bars on number pad "+" and Enter keys |
1397661 | Buckling spring | No | Yes | PS/2 | Yes | Blue, left corner | IBM | 1992 | IBM Corp. 1984 | 1391401 variant with one-piece keys (few examples known) |
1397721 | Buckling spring | Yes | Yes | PS/2 | Yes (1992) | Gray WANG logo, left corner | IBM | 1991–92 | IBM Corp. 1984 | Produced during IBM/WANG partnership; few examples known |
1397681 | Buckling spring | No | Yes | PS/2 (or AT?) | Yes | Gray, left corner (later Blue) | IBM | ?–1991–93–? | IBM Corp. 1984 | Space Saving Keyboard (no numeric keypad or lock lights) |
1399625 | Buckling spring | Yes | No | PS/2 | Yes | Blue, left corner | Lexmark, IBM UK | ?–1994–? | Lexmark International Inc. 1985 | Terminal keyboard; no lock lights |
1403975 | Buckling spring | No | No | PS/2 | Yes | None, empty rectangle on left corner | Lexmark | ?–1994–? | Lexmark International, Inc. 1984 | Spanish QWERTY layout |
13H6705 | Buckling spring | No | No | PS/2 | Yes | Silver, left corner | Lexmark, Maxi Switch | 1994–98 | Lexmark International, Inc. 1984, or None (on Maxi Switch models) | Trackpoint, two connectors for keyboard and mouse, the only Model M to come in Black |
42H1292, 92G7453, 92G7483 | Buckling spring | Yes | No | PS/2 | Yes | Blue, left corner | Lexmark, IBM UK | 1993–99 | Lexmark International, Inc. 1984 | |
42H1292U | Buckling spring | Yes | No | PS/2 | Yes | Blue, left corner | Unicomp | 1996– | Unicomp, Inc. 1984 | Optional AT/DIN adapter |
51G8572 | Buckling spring | Yes | Yes | PS/2 | Yes | Gray/Blue, left corner | IBM, Lexmark, IBM UK | 1993–97 | IBM Corp. 1984, Lexmark International, Inc. 1984 | Model M; shipped with IBM RS/6000; contains real speaker |
52G9658 | Buckling spring | Yes | No | PS/2 | Yes | Blue, left corner | Lexmark | ?–1993–? | Lexmark International, Inc. 1984 | |
52G9700 | Buckling spring | No | No | PS/2 | Yes | Blue, left corner | Lexmark | 1993–99 | Lexmark International, Inc. 1984 | |
59G7980 | Buckling spring | Yes | Yes | PS/2 | Yes | Blue, left corner | Lexmark | 1993 | Lexmark International, Inc. 1984 | |
70G8638 | Rubber Dome | No | No | PS/2 | Yes | Square, top right | Lexmark | ?–1994–? | Lexmark International. Inc. 1984 | Silkscreen-printed keycaps |
71G4621 | Dome switches | Yes | No | PS/2 | Yes | Blue, left corner | Lexmark (for IBM) | ?–1996–? | Lexmark International, Inc. 1984 | Danish QWERTY layout |
71G4622 | Dome switches | No | No | PS/2 | Yes | Blue, left corner | Lexmark (for IBM) | ?–1995–? | Lexmark International, Inc. 1984 | Dutch QWERTY layout, 1378705, EC1391461 |
71G4625 | Dome switches | No | No | PS/2 | Yes | Grey, left corner | Lexmark (for IBM) | ?–1993–96–? | Lexmark International, Inc. 1985 | German QWERTZ layout |
71G4630 | Dome switches | No | No | PS/2 | Yes | Blue, left corner | Lexmark (for IBM) | ?–1994–? | Lexmark International, Inc. 1984 | Italian QWERTY layout |
71G4638 | Dome switches | No | No | PS/2 | Yes | Blue, left corner | Lexmark (for IBM) | ?–1993–? | Lexmark International, Inc. 1984 | Spanish QWERTY layout |
71G4643 | Dome switches | Yes | No | PS/2 | Yes | Blue, left corner | Lexmark | ?–1995–? | Lexmark International, Inc. 1985 | |
71G4644 | Dome switches | No | No | PS/2 | Yes | Blue, left corner | Lexmark | ?–1993–95–? | Lexmark International, Inc. 1984 | |
8131276 | Buckling spring | No | No | RJ25 | Yes | Blue, Upper-right corner | IBM UK | ?–1997 | IBM Corp. | |
82G2383 | Buckling spring | Yes | No | PS/2 | Yes | Blue, left corner | Lexmark | 1993–99 | Lexmark International, Inc. 1984 | |
82G3281 | Buckling spring | No | No | PS/2 | Yes | ? | Lexmark | 1994–95 | Lexmark International, Inc. 1984 | White trackpoint, two connectors for keyboard and mouse |
82G3295 | Buckling spring | Yes | No | PS/2 | Yes | Blue "IBM", top left corner | Lexmark | ?–1995–? | Lexmark International, Inc. 1984 | |
06H4173 | Buckling spring | No | No | PS/2 | Yes | Blue "IBM", top left corner | Unicomp | 1998–99 | Unicomp, Inc. 1984 (or no copyright on label) | Industrial PS/2 trackpoint, two connectors for keyboard and mouse, uses Unicomp pointing device instead of IBM Trackpoint II |
UB40R46 | Buckling spring | No | No | PS/2 | Yes | ? | Unicomp | ?– | Unicomp, Inc. 1984 | 104 key, customizable layout. |
UB4044A | Buckling spring | Yes | No | USB | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 104 key, customizable layout. Black case with uniform light gray keys. |
UB40446 | Buckling spring | Yes | No | PS/2 | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 104 key, customizable layout. Black case with uniform light gray keys. |
UB4041A | Buckling spring | Yes | No | USB | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 101 key, customizable layout. Black case with uniform light gray keys. |
UB40416 | Buckling spring | Yes | No | PS/2 | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 101 key, customizable layout. Black case with uniform light gray keys. |
UNI041A | Buckling spring | Yes | No | USB | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 101 key, customizable layout. Beige case with classic light and dark beige keys. |
UNI0416 | Buckling spring | Yes | No | USB | Yes | Unicomp label integrated with LED panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 101 key, customizable layout. Beige case with classic light and dark beige keys. |
UNI0446 | Buckling spring | Yes | No | PS/2 | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 104 key, customizable layout. Beige case with classic light and dark beige keys. |
UNI044A | Buckling spring | Yes | No | USB | Yes | Unicomp logo on lock-light panel | Unicomp | ?–Present | Unicomp, Inc. 1984 | 104 key, customizable layout. Beige case with classic light and dark beige keys. |
02K3817 | Buckling spring | Yes | No | PS/2 | Yes | None | Unicomp | ?– | Unicomp, Inc. 1984 | German layout unicomp keyboard |
UNI0T56 | Buckling spring | No | No | PS/2 | Yes | None | Unicomp | ?–2003–? | ? | 122 key, laid out for use with PC/5250 emulators; produces standard 101-key scancodes with keys that are not present on a standard keyboard mapped to standard keys with modifiers (e.g., F24 appears to the PC as shift+F12) |
1386887 | Buckling spring | Yes | No | Terminal DIN-5 | No | Square metal, black on silver. Upper right. | IBM | ?–1986–? | IBM Corp. 1985 | 122 key 3179 terminal keyboard |
1389194 | Buckling spring | Yes | No | Terminal DIN-5 | No | Square metal, black on silver. Upper right. | IBM | ?–1986–? | IBM Corp. 1984 | 122 key 3179/3192 terminal keyboard, APL keycaps |
1369182 | Buckling spring | No | No | PS/2 | Yes | "DELL" logo, grey on white, upper left corner | Lexmark "Made in the USA" | ?–1993–? | Lexmark International, Inc. 1984 | Latin American QWERTY Layout |
1369050 | Buckling spring | No | No | PS/2 | Yes | "DELL" logo, grey on white, upper left corner | Lexmark "Made in the USA" | ?–1994–95–? | Lexmark International, Inc. 1984 | US Standard QWERTY Layout |
Part Number | Key Type | Detachable | Interface | Drainage Channels | Label Type/Position | Manufacturer | Dates of Manufacture | Copyright | Misc features | |
Key Caps | Cable |
Note: The manufacture dates are approximate. Click "Show" to display the uncollapsed table.
Gallery
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IBM model M 1394542 keyboard, manufactured August 7, 1997.
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IBM model M 1394542 keyboard backside, manufactured July 27, 1994.
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IBM model M SpaceSaver (without numpad), manufactured 1987. With SDL to USB adapter.
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IBM model M SpaceSaver (without numpad), manufactured 1987. Visible inside the steel plate on the backside.
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Comparison of different versions of IBM and Unicomp keyboards. From top to bottom: IBM Model M Square Logo 1390131 (1986), Unicomp Spacesaver M UNIZPHA (2011), IBM Model M Space Saving 1392934 (1991).
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Unicomp Classic 104 (UNI044A) keyboard, manufactured April 23, 2012.
See also
References
- ↑ King of click: the story of the greatest keyboard ever made
- ↑ "The Best Keyboard You've Ever Typed On". Life hacker. Retrieved 2013-12-01.
- ↑ "Inside the World's Greatest Keyboard". PC World. Retrieved 2013-12-01.
- ↑ "The world's best keyboard, and why it's so great". UK: PC advisor. Retrieved 2013-12-01.
- ↑ 5.0 5.1 Kaste, Martin (January 30, 2009), Old-School Keyboard Makes Comeback of Sorts, National Public Radio.
- ↑ "Customs Ruling HQ 544887". U.S. Customs and Border Protection. October 2, 1992.
- ↑ "IBM Archives: 1990s". IBM.
- ↑ Lewis, Peter H. (December 22, 1991). "The Executive Computer; Can IBM Learn From a Unit It Freed?". The New York Times.
- ↑ Levine, Bernard (1991). "Keyboard vendors punched on prices". Electronic News.
- ↑ "Lexmark International Reports Best Year Ever Since Independent of IBM". Business Wire. December 12, 1994.
- ↑ "Lexmark International Group 1996 annual report, SEC Form 10-K". Advameg. March 24, 1997.
- ↑ US patent 4118611, Richard Hunter Harris, "Buckling Spring Torsional Snap Actuator", issued 1978-10-03 — an IBM patent for buckling spring keys.
- ↑ "My Clickety IBM Keyboard – RIP". ASP. May 4, 2005. Retrieved January 2011.
- ↑ http://web.archive.org/web/20080228180642/http://www.geocities.com/jszybowski/keyboard/index.htm
External links
Wikimedia Commons has media related to IBM Model M Keyboard. |
- PC keyboard, Unicomp – current Model M manufacturer.
- Clicky keyboards – distributor of refurbished and never used Model M keyboards.
- "Inside the World's Greatest Keyboard", PC World.
- Care and feeding of an IBM Model M keyboard, Preater – a Model M restoration guide.
- Cramer, Ryan, "The IBM Model-M Keyboard", Timeless Tools, RCD.
- Product Review: Unicomp Ultra Classic keyboard, or, the IBM Model M reborn, The Story's Story – Comprehensive review.