The Model 33 Teletype keyboard connected to the computer Mr Tomlinson was using only had about 12 punctuation characters.

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Market technicians never like to be wrong for more than 15 minutes, so Joe detected every squiggle in the market and fired off snappy teletype messages to the brokers throughout E.

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He was the author of a number of discoveries relating to the telegraph industry, including a self-adjusting relay that solved the problem of circuits sticking open or shut, and a telegraph printer a precursor of what was later called the Teletype machine.

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