Original specs/details

Full Name IBM Model 100 Functional Keypad Emulator
Part NumberPart Number
The number used to describe this keyboard's specific release; usually specific for a target region, language or SKU, etc.
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 M PS/2 50-Key Function Keypad
A [keyboard enthusiast] community given name for this keyboard. It can be a shortening of its name and properties, a more abstract term, a real-life reference, or metonymy.
The name of the known switching mechanism that lies under this keyboard's keys.
IBM membrane buckling springs
Original KeycapsOriginal Keycaps
The keyboard's original keycaps' material and text/symbol printing technique.
PBT with dye-sublimated legends
The style of this keyboard's flip-out or extendable feet. If applicable, this may also state how many levels of height adjustment are available and whether the feet could be rubberised.
Single-setting flip-out feet
The protocol(s) this keyboard can use to speak to the host computer (eg, scancode sets).
IBM Mode 2 (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.
Grey coiled-style detachable 6-pin SDL to PS/2 mini-DIN cable
Form FactorForm Factor
The standardised or universally acknowledged name for this keyboard's layout form factor.
50% matrix
Production Date 2000-08-25
Acquisition Date 2019-11-29

About this keyboard type

The 50-key Model Ms ("M50s") were matrix-style keypads intended for IBM Personal System/2 computers running bank teller applications. They first appeared in November 1987 for the IBM 8530-R02, a version of the IBM PS/2 Model 30 intended for such a purpose with IBM 4700 host support. They possessed the same physical layout as the 50-key Model F-based IBM 4704 Model 100 keypads and could come with transparent, functional or alphanumeric legends. These are one of two Model Ms whose internal assembly is based on an older Model F device and thus takes several production values from Model F designs; individual barrels, metal barrel plate, foam padding, and no plastic rivets holding the assembly together. The assembly's previous incarnation was the aforementioned 50-key Model F IBM Model 100s these M50s replaced.

Typing demo