|Market Model Name/Feature CodeMarket Model Name/Feature Code
The consumer-friendly model number describing this keyboard as a part of a range of products, usually irrespective of target region, language or SKU.
A designation from my own type naming scheme used to categorise this keyboard with or from others by their common features and market intent but may/may not be derived from official names.
|Model M3 Numeric Keypad|
Possible companies responsible for making this keyboard for the company marketing it.
The name of the known switching mechanism that lies under this keyboard's keys.
|IBM buckling rubber sleeves (M3/M4 rod-actuated type)|
|Earliest AppearanceEarliest Appearance
The year (and possibly the quarter) that this keyboard part number was introduced, first observed, first recorded or the first example found.
|Original KeycapsOriginal Keycaps
The keyboard's original keycaps' material and text/symbol printing technique.
|PBT with dye-sublimated legends|
|Casing ColourCasing Colour
The original colour of this keyboard's outer casing. For keyboards whose casing materials are known to yellow, this will refer to the original colour before such transformation occurs.
The possible branding and logo styles found on this keyboard part number. This could be multiple styles at once or possible styles found over time.
|IBM grey oval badge|
The protocol(s) this keyboard can use to speak to the host computer (eg, scancode sets).
|IBM scancode set 2|
The keyboard-to-host connection. This is could be a description of a cable (its colour, whether its coiled, whether its detachable, and what connector is at its end) or the name of a wireless technology.
|Detachable modular-8P8C ("RJ-45") to PS/2-like combined keypad/mouse mini-DIN cable|
|Key CountKey Count
The number of keys that this keyboard originally had.
|Form FactorForm Factor
The standardised or universally acknowledged name for this keyboard's layout form factor.
The original regional/language layout this keyboard was configured as. Both the language and the standardised key layout may be listed, and in the case of both being known or defined, it will be styled as language then standard.
|Additional NotesAdditional Notes
Extra notes about this keyboard that may be of interest or are important to know.
|Sports a pass-through PS/2 connector for PC-compatible mice|
Documents ("Doc"), websites and/or webpages ("Web") that were used as a source of information for this keyboard part number. Examples of this keyboard part number I own ("ASK") will also be included as sources.
|Doc: The IBM PS/2 Model L40 SX system (8543-A44) and Features (#ZG91-0105) [source: IBM]
|Data Last Updated||2022-03-20|
More on this type of keyboard...
The Model M3 numeric keypad was an optional peripheral for the IBM Personal System/2 L40SX laptop. The keypad uses the same buckling sleeves switches as the host laptop, making it notable as being the first discrete device featuring IBM's buckling sleeves switches. The keypad sports a passthrough PS/2 mouse socket, but it connects to the host laptop via a proprietary connection.