TRSDOS (which stood for the
Tandy
Radio
Shack
Disk
Operating
System) was the
operating system for the
Tandy TRS-80 line of 8-bit
Zilog Z80 microcomputers that were sold through
Radio Shack through the late 1970s and early 1980s. Tandy's manuals recommended that it be pronounced
triss-doss. TRSDOS should not be confused with
Tandy DOS, a version of
MS-DOS licensed from
Microsoft for Tandy's
x86 line of
personal computers (PCs).