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Re:My HN November app: Quick Brown Frog by jasonkester on Tuesday November 23, 2010 @11:45AM (#1934281)
Indeed, but the article you reference is about typesetting, not typing.

Schools were still teaching the double-space typing method well into the 90's (and probably beyond), so if you're building a product for people who type and are potentially older than 30, it's probably a good idea to account for the fact that they're likely to type two spaces after a period.

Re:My HN November app: Quick Brown Frog by nickknw on Tuesday November 23, 2010 @12:04PM (#1934382)
FWIW, I am 22 and I was also taught this way.