No 500, Type KCA-1, C1980.
The original Maltron keyboard.
No 504, Type KBA3, 1980.
No 517, Type KQA, 1980.
No 528, Type KBO, c1981.
No 555, 1984.
No 611, Type KIBM
No 644, Type KIBM, 1985.
First to have index finger keys lower.
No 1763, Type DGICQ(*), Jan 1994.
No 2080, Type DGTCQ/N, Sept 1994.
No 2557, Type DGICQ, Oct 1995.
No 4121, Type DGMCQ, March 1999.
No 9513, Type DGIFM, May 2007.