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=====Typewriter-derived printers=====
{{main article|Friden Flexowriter|IBM Selectric typewriter}}
[[File:IBM Selectric typeball.jpg|thumb|left|Typeball print element from IBM Selectric-type printer]]дЗгп
Several different computer printers were simply computer-controllable versions of existing electric typewriters. The [[Friden Flexowriter]] and [[IBM Selectric typewriter|IBM Selectric-based]] printers were the most-common examples. The Flexowriter printed with a conventional typebar mechanism while the Selectric used IBM's well-known "golf ball" printing mechanism. In either case, the letter form then struck a ribbon which was pressed against the paper, printing one character at a time. The maximum speed of the Selectric printer (the faster of the two) was 15.5 characters per second.
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