IBM typewriting ball element ad
Posted Aug 15, 2023 2 min read
IBM typewriting ball element ad

This wild looking metal ball embossed with letters was the innovation behind the IBM Selectric Typewriter (13m+ sold). Normally people don't care *how* something works, but this mechanism was so unique and interesting looking it because the main highlight of this print ad. You can see a slow-mo gif of it where in milliseconds it:...Read More

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