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P/N 33G4492

IBM PS/Note 82 series Keyboard Assembly

Type
Model M3-based Laptop Keyboard Assembly
OEM
Lexmark
Earliest Appearance
1992
Casing Colour
Raven Black
Branding
None
Feet
None
Connection
Integrated
Key Count
85
Form Factor
Tenkeyless (compacted)
Layout/Language
US/Canadian/Australian ANSI
Data Last Updated
2021-12-14

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Variant of a Model M3-based Laptop Keyboard Assembly
Variant of a Model M3-based Laptop Keyboard Assembly

The IBM Personal System/2 L40SX was an early laptop that featured IBM's first buckling sleeves keyboard assembly, which represented the first step of a major divergence in the Model M family that broke the largely buckling springs-based paradigm. Whilst not specifically designated a Model M, the L40SX's numeric keypad option with the same switches and the discrete Model M4 keyboards that used the same assemblies were designated members of the Model M family, and this was the origin for both. The 1992-launched IBM CL57SX also possessed the same buckling sleeves keyboard assembly, albeit in black and had an overlayed numeric keypad layer much like the SSK.

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