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While the software environment was stable, the cassette load/save process combined with keyboard bounce issues and a troublesome Expansion Interface contributed to the Model I's reputation as not well-suited to serious use. A cassette tape drive for program storage was included in the original package. The TRS-80 has a full-stroke QWERTY keyboard, the Zilog Z80 processor, 4 KB dynamic random-access memory (DRAM) standard memory, small size and desk area, floating-point Level I BASIC language interpreter in read-only memory (ROM), 64-character per line video monitor, and a starting price of US$600 (equivalent to US$2,700 in 2022). It is one of the earliest mass-produced and mass-marketed retail home computers. The name is an abbreviation of Tandy Radio Shack, Z80. The TRS-80 Micro Computer System ( TRS-80, later renamed the Model I to distinguish it from successors) is a desktop personal computer launched in 1977 and sold by Tandy Corporation through their Radio Shack stores. Monochrome 12" CRT, 64 × 16 character semigraphics
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