The IBM Electric typewriters were a series of electric typewriter

Typewriter

A typewriter is a mechanical or electromechanical device with keys that, when pressed, cause characters to be printed on a medium, usually paper. Typically one character is printed per keypress, and the machine prints the characters by making ink impressions of type elements similar to the pieces...

s that IBM manufactured, starting in the mid-1930s. They used the conventional moving carriage and typebar mechanism, as opposed to the fixed carriage and type ball used in the IBM Selectric, introduced in 1961. After 1944, each model came in both Standard and Executive versions, the latter featuring proportional spacing.

IBM typewriters had one feature lacking in many mechanical typewriters:The top row bore the digits 1234567890; other typewriters generally omitted the 1 and 0.