TRS-80

The TRS-80 is a computer made by Tandy Corporation sold by Radio Shack.

TRS-80 Model I with Expansion Interface
Type	Home computer
Release date	August 3, 1977 (1977-08-03)
Discontinued	January 1981
CPU	Zilog Z80 @ 1.78 MHz
Memory	4 KB ~ 48 KB

TRS-80 Media

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  Tandy/Radio Shack TRS-80 Model I

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  Byte's "1977 trinity": Commodore PET, Apple II, and TRS-80 Model I

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  Tandy/Radio Shack TRS‑80 Model I PCB

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  Tandy/Radio Shack TRS‑80 Model I rear-panel connectors

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  Tandy/Radio Shack TRS‑80 Model I Level II ROM Upgrade PCB

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  Tandy/Radio Shack TRS‑80 Model I Alps keyboard PCB

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  Layout of characters and pixels on the TRS-80 display

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  TRS-80 Model 4 (standard version)

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  Tandy Radio Shack TRS-80 Model 4P

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  DGT-100 by DIGITUS Ind. Com. Serv. de Eletrônica Ltda., one of a dozen brands of TRS-80 clones made by other companies.