TRS-80 [SEP] manufacturer
TRS-80
The TRS-80 Micro Computer System (TRS-80, later renamed the Model I to distinguish it from successors) is a desktop microcomputer launched in 1977 and sold by Tandy Corporation through their RadioShack stores. The name is an abbreviation of "Tandy/RadioShack, Z80 microprocessor". It is one of the earliest mass-produced and mass-marketed retail home computers.
The TRS-80 has a full-stroke QWERTY keyboard, the Zilog Z80 processor (rather than the more common Intel 8080), 4 KB DRAM standard memory
on 5.25" disks; 3.5" drives were used for data storage. Standardization of disk formats was not common; sometimes even different models from the same manufacturer used different disk formats. Almost universally the floppy disk drives available for 8-bit home computers were housed in external cases with their own controller boards and power supplies contained within. Only the later, advanced 8-bit home computers housed their drives within the main unit; these included the TRS-80 Model III, TRS-80 Model 4, Apple IIc, and Commodore 128D. The later 16-bit machines such