Foone recently examined the guts of a digital pregnancy test to find that it was a fully-functional system on a chip that simply looks at the lines on a standard test strip and reports what it sees. They originally reported that the pregnancy test, with its baked-in ROM and tiny display, couldn't play Doom. Foone [&]

https://boingboing.net/2020/09/07/doom-playing-on-a-pregnancy-te.html