[TaxRelief]

The use of proportionally spaced fonts did not come into common use for office memos until the introduction high-end word processing systems from Xerox and Wang, and later of laser printers, word processing software, and personal computers.

The first proportionally spaced typewriter was released in 1941 by IBM.

From the IBM History page:

1941 - IBM announces the Electromatic Model 04 electric typewriter, featuring the revolutionary concept of proportional spacing. By assigning varied rather than uniform spacing to different sized characters, the Type 4 recreated the appearance of a printed page, an effect that was further enhanced by a typewriter ribbon innovation that produced clearer, sharper words on the page. The proportional spacing feature became a staple of the IBM Executive series typewriters.

[TastyManatees]

Thanks. See post # 156.

[Travis McGee]

Please read reply #198, and tell us if you think that was likely in 1972 in the TANG.