Original Ohio Scientific OSI 495 Circuit board

Original Ohio Scientific OSI 450 Circuit board

Reproduction Ohio Scientific OSI 510C Triple CPU Board

Reproduction Ohio Scientific OSI 540B Color Video Board Interface Challenger

Reproduction Ohio Scientific OSI 400 "Superboard" 6502 CPU Board SBC

Reproduction Ohio Scientific OSI 580 8-Slot Backplane

Oregon Scientific Osaris PDA Handheld Computer Vintage - Not Powering On

VINTAGE DOUGLAS ELECTRONICS INC. 11-DE-3 Prototyping PCB gold fingers