First encounter: Ohio Challenger 2P (and its 4KB of RAM) | Ars Technica
Retro Thing: Ohio Scientific Superboard II - The Arrival of Affordable Single Board Computing
File:Ohio Scientific Superboard cabinet.jpg - Wikimedia Commons
Ohio Scientific Model 600 - CHM Revolution
Challenger 1P
Checking out an Ohio Scientific Inc. Challenger 4P
File:OSI Challenger 4P.jpg - Wikimedia Commons
An Ohio Scientific Challenger 4P Demo Program - YouTube
Ohio Scientific - Wikipedia
Mark's Ohio Scientific/Compukit UK101 Archive
Ohio Scientific Challenger 1P – Time-Line Computer Archive
Ohio Scientific Superboard II model 600 computer
Ohio Scientific | Vintage Vibe
VC&G | » Retro Scan of the Week: Ohio Scientific Challenger 4P
The Ohio Scientific Inc. Challenger 1P and 4P: As seen in Tezza's classic computer collection. - YouTube
Ohio Scientific Computers: Challenger III (OEM) | Professor Mark Csele
Ohio Scientific - Wikipedia
Ohio Scientific Superboard II model 600 computer
OSI Challenger C4P-MF
Ohio Scientific - CommodoreZ.com
Ohio Scientific Challenger III, Repaired and (mostly) Working : r/retrobattlestations
nosher.net - Ohio Scientific advert: The world's most powerful microcomputer system is far more affordable than you may think
Ohio Scientific Challenger 1P and 4P
Ohio Scientific Challenger 8P Microcomputer | National Museum of American History
OLD-COMPUTERS.COM Museum ~ OHIO Scientific CHALLENGER 4P
