The ASR33 - which stands for Automatic Send Receive - was the classic teletype. This is a dumb terminal for serial connection to computers. Input is via a keyboard of sculpted circular keys. Output is via a golfball onto continuous paper. The ASR33 also had a paper tape device for input and output.

In use, the ASR33 is extremely slow (110 baud) and noisy. You can see a picture of one at

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