The ZX81 was launched in 1981 by Sinclair and came in kit form for £49.95 or fully assembled for £69.95. The ZX81 offered 1KB of memory and an 8-bit CPU with a speed of 3.25 MHZ.
BASIC is an acronym for Beginners All-purpose Symbolic Instruction Code
8-bit is an early computer hardware device or software program that is capable of transferring eight bits of data at the same time.
8-bit computer manufacturers Sinclair, Acorn and Tangerine (Oric) were all based within a few miles of each other in Cambridgeshire England.