Autopsy:

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from Wikipedia:

TRS-80 was Tandy Corporation’s desktop microcomputer model line, sold through Tandy’s Radio Shack stores in the late 1970s and early 1980s. The line won popularity with hobbyists, home users, and small-businesses. Tandy Corporation’s leading position in what Byte Magazine called the “1977 Trinity” (Apple, Commodore and Tandy) had much to do with retailing the computer through more than 3000 of its Radio Shack (Tandy in the UK) storefronts.

Notable features of the original TRS-80 included its full-stroke QWERTY keyboard, small size, well-written Floating Point BASIC programming language, an included monitor, and a starting price of $600.

The MC-10 was a short-lived and little-known Tandy computer, similar in appearance to the Sinclair ZX81.

It was a small system based on the Motorola 6803 processor and featured 4 KB of RAM. A 16 KB RAM expansion pack that connected on the back of the unit was offered as an option as was a thermal paper printer. A modified version of the MC-10 was sold in France as the Matra Alice. Programs loaded using a cassette which worked much better than those for the Sinclair.

A magazine was published which offered programs for both the CoCo and MC-10 but very few programs were available for purchase. Programs for the MC-10 were not compatible with the CoCo.

source: wikipedia trs-80.com themc10archive.com