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typewriter Noiseless typewriters. The noiseless linkage is a variation of the conventional typebar linkage causing the typebar to strike the platen at a lower velocity but with the same momentum. Although it produces less noise than the conventional typewriter, the noiseless typewriter cannot produce as fine an impression or as many carbon copies. Electric typewriters. A significant advance in the typewriter field was the development of the electric typewriter, basically a mechanical typewriter with the …

…was introduced that would automatically justify a line of type with one keyboarding. This was accomplished by a system in which the operator typed manually into a storage unit, from which a computer first automatically compensated for line length and then operated a second typing mechanism. By mid-20th century the typewriter had begun to be used as a composing machine in spite of its limitations, and it became more popular as improvements were developed.