
Tandy/Radio Shack Advert - August 1979
From Personal Computer World
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New low price for Level 1 BASIC 4K RAM
The TRS-80 was one of the "1977 Trinity" - which also included the Commodore PET and the Apple II. They were the first three modern personal computers - micros that could be taken out of a box, plugged in, turned on and would be ready to use.
Legend has it that Chuck Peddle - inventor of the 6502 microprocessor - approached Radio Shack, owner of the Tandy name, as a potential outlet for his PET machine. Radio Shack said it was uninterested, only to take the idea and produce a machine of its own.

One of Radio Shack's extensive US network of Main Street shops, probably taken in 1977 or '78 and showing hand-made signs for the TRS 80 computer department. From Micro Decisions, May 1982
For a while the TRS-80 - or Trash 80 as it was sometimes uncharitably known - was the best-selling of the three, and came in several forms, including a keyboard-only version.
The combination as shown in the advert retailed for £431 - about £2,980 in 2025 prices, making it cheap compared to the PET and the Apple II.
Date created: 01 July 2012
Last updated: 11 December 2024
Text and otherwise-uncredited photos © nosher.net 2025. Dollar/GBP conversions, where used, assume $1.50 to £1. "Now" prices are calculated dynamically using average RPI per year.