Radius Inc.

Radius Inc. was an American computer hardware firm founded in May 1986 by Burrell Smith, Mike Boich, Matt Carter, Alain Rossmann and joined by other members of the original Macintosh team like Andy Hertzfeld. The company specialized in Macintosh peripherals and accessory equipment. It completed its IPO in June 1990.

Their products included processor upgrade cards (Radius Accelerator) bringing Motorola68020 processors to earlier Macintosh systems; graphics accelerators (Radius QuickColor); television tuners (RadiusTV); video capture cards (VideoVision); color calibrators (PrecisionColor); multi-processor systems (Radius Rocket) for 3D rendering and multiple OS sessions; high-end video adapters and monitors.