portable computer model M15
1986
Casio FX702P
1980-1985
Montgomery Ward electronic 1
circa 1973
Sinclair Cambridge pocket calculator
1973
Conic 750F electronic calculator
1974
Compaq 486c
1991
Sharp Compet ELSI 811
circa 1970
1986
1980-1985
circa 1973
1973
1974
1991
circa 1970