Decided to make my next Admiral Shark's Keyboards wiki page on the P/N 1393387 IBM Screen Reader Keypad (or SRK, as I call it!), a unique 18-key Model M keypad with an interesting layout, detachable SDL to PS/2 cable and a "hybrid" assembly design with both Model F and Model M design traits - despite the clear Model M appearance, it's got DNA of an IBM Model F keyboard on the inside due to recycled tooling/assembly process from
IBM 3290-1 keypads.
The SRK was peripheral component of the IBM Screen Reader series, first announced in January 1988 as a pioneering screen reader designed to help people with hard or lack of sight access a PC and seems to be the brainchild of Jim Thatcher (a then mathematician working at IBM). The keypad is sometimes erroneously solely attributed and named to the IBM Screen Reader/2, which was a single release of the series introduced in 1992 (several years after the keypad entered production). The SRK was typically connected through a PC's PS/2
mouse port or a special 8-bit ISA card for PC/XT and PC/AT compatibles. The SRK was withdrawn from marketing on 11th April 1995, but not before IBM introduced a new Screen Reader Keypad - P/N 06H5990 with an integrated cable - that has yet to be "rediscovered" to my knowledge (I have no idea if its a variant of the Model M SRK, or something entirely different).
The page:
https://sharktastica.co.uk/wiki?id=modelmsrkEnjoy!