From 1979 on, when the TRS-80 Model II was introduced, TRS-80 referred to a line of computers which included models with differing CPUs, operating systems and f

From 1979 on, when the TRS-80 Model II was introduced, TRS-80 referred to a line of computers which included models with differing CPUs, operating systems and form factors. Although it is mostly associated with the Z80 line the TRS-80 line included systems which used the Z80, Motorola 6800 series, Motorola 68000, Intel 80C85 and the Intel 80186. Some of the machines ran proprietary OSs while others ran UNIX or MS-DOS. The Tandy Color Computer was actually originally the TRS-80 Color Computer.