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TRS-80 Model 1 Level 1 - 1977

The TRS-80 Micro Computer System (TRS-80; later known as the Model I to distinguish it from successors) is a desktop microcomputer launched in 1977 and sold by Tandy Corporation through …

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TRS-80 Model 1 Level II - 1978

In March 1978 Tandy introduced the first version of Level II BASIC for the TRS-80 Model 1.  A Level 1 to Level II upgrade was available from Radio Shack dealers. …

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TRS-80 Model II - 1979

The TRS-80 Model II was a computer system launched by Tandy in October 1979, and targeted at the small-business market.  Despite its name, the Model II was not an upgrade …

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TRS-80 Model III - 1980

In July 1980, Tandy released the TRS-80 Model III. The improvements of the Model III over the Model I included: built-in lowercase, a better keyboard with repeating keys, an enhanced …

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TRS-80 Color Computer 1 - 1980

The Radio Shack TRS-80 Color Computer (also marketed as the Tandy Color Computer and affectionately nicknamed CoCo) is a line of home computers based on the Motorola 6809 processor.  Despite …

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TRS-80 Model 4 - 1983

The successor to the Model III was the TRS-80 Model 4. It had faster Z80A 4 MHz CPU, a larger video display 80 columns x 24 rows, bigger keyboard, and …

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TRS-80 Model 4P - 1983

A “luggable” version known as the Model 4P is a self-contained unit with a case design similar to that of a portable sewing machine. It had all the features of …

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TRS-80 Model 4D - 1985

The TRS‑80 Model 4D was Radio Shack’s final entry in the line of TRS‑80 computers that began in 1977 with the Model I. Many people consider it to be the …

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