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I didn't even realize the act of adding single spaces after a period was a thing until a month ago, when a (younger) coworker pointed it out. But man, is it a hard habit to break. (Just looked up and noticed double spacing after periods within this text)

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I knew it was a thing, but I thought it was something only taught to people who learned to type on actual typewriters.

HTML will strip the extra space out, and most mobile operating systems default to double space mapping to space+period.

I had an English teacher that made us do it in the early 2000s. I think its because she learned on the actual typewriter. It never stuck though. We all just went through and added the extra spaces at the end.

I took "keyboarding" in high school on PS/2 computers with sweet, sweet Model M keyboards. That would have been late 1994/early 1995. We were taught to use two spaces.

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