During the 80's/90's there were various experiments with broadcasting software over TV and radio for people who were interested in those weird new "computer" things.

A few radio shows allotted time for broadcasting software over the air: Record the audio stream to tape cassette and load it back on your computer.

On TV an accessory was sold (forgot its name) that was a simple photoresistor you'd plug to your computer and place on the corner of your TV screen where a blinking black/white box would relay encoded data for your computer to store.

And then there was Teletext!

The BBC Micro had an adapter that let it view Teletext pages and even save them to file, so naturally they also broadcasted software over teletext.

Teletext archive (a bit slow): archive.teletextarchaeologist.

Teletext was broadcast as 'pages'. To view a page type its number into the 'P' box overhead.

Some of the text is corrupt because of the state of the VHS tapes the data was restored from but it's still worth a look!

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If you have VHS tapes sitting around with recorded TV shows from channels that had Teletext, there's a good chance that you have Teletext signals stored along with the show! Video recorders used to just dump the entire broadcast signal into tape, including the invisible part.

You can get to this data with these tools: github.com/ali1234/vhs-teletex

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