OSI — vintage systems
13 machines in the registry, 1977–1979.
- 1977 OSI Challenger
- 1977 OSI Challenger II
- 1977 OSI Challenger III
- 1977 OSI Challenger IIP
- 1977 OSI Model 500
- 1977 OSI Superboard II
- 1978 OSI Challenger IP
- 1979 OSI Challenger II 4P (C2-4P)
- ? OSI C-3
- ? OSI Challenger 8P
- ? OSI Challenger 8P DF
- ? OSI Challenger I Series 2
- ? OSI Challenger II Series 2