A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
Ohio Scientific
C2 | Challenger 1P | Challenger II | Challenger III | Challenger 4P | Model 500 | Superboard II
OKI
A 10 | IF 800 | IF COM7
Olivetti
ETS 1010 | M10 | M20 | M24 | P6040 | P6060 | PC 1 | Prodest PC 128 | Prodest PC 128S | Programma P101/P102
Olympia
Boss | OP 544 / OP 644 | PHC-2
Ontel
Amigo | OP-1
Ordisor
PCC 2000
Oric
Atmos | Nova 64 | Oric 1 | Stratos / IQ 164 | Telestrat
Osborne
08 | Encore | Executive | Osborne 1 | Vixen