P/N 98U0153
Type
Model M4-1 Space Saver TrackPoint II Keyboard
OEM
Unicomp
Switches
IBM M3/M4/ThinkPad buckling sleeves (Lexmark variant)
Earliest Appearance
2005
Casing Colour
Black
Branding
Unicomp logo on lock lights
Feet
Single-setting flip-out feet
Protocol
Set 2/AT
Connection
Cable
Cable
Grey coiled detachable SDL to dual PS/2
Key Count
83
Layout/Language
US ANSI
Built-In Mouse
TrackPoint II
Data Last Updated
2021-05-16
More about this type of keyboard...
The IBM Space Saver Keyboard with TrackPoint II (not to be confused with the IBM Space Saving Keyboard or SSK) was the discrete desktop and server environment adaptation of the IBM Personal System/2 L40SX laptop's Model M3-based buckling sleeves keyboard assembly. Compared to the standard Model M4, the M4-1 is a modified design that equips a TrackPoint II pointing stick. These M4-1s were notable for being the first IBM desktop keyboard to feature TrackPoint strain gauge technology and the only Model M to retain such a stick when produced by Unicomp. M4-1s were originally produced by Lexmark and Key Tronic, however, Unicomp continued production until the late 2000s. Unicomp's internal codename for the M4 family was "Surf".