The 6800 family of 8-bit microprocessors (µPs) and microcontrollers (µCs) is based upon the Motorola 6800 CPU. The architecture also inspired the MOS Technology 6502, and that company initially started business producing 6800 clones.
The chips primarily competed against Intel's 8-bit family of chips (such as the 8080, or their relations, the ZiLOG Z80 range).
See also 
This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.