I am probably among the very last Americans who learned to type on an old fashioned typewriter. I did take typing starting in middle school but I had already learned to type at home. (I’m only in my 20’s but I was always learning things on my own) My current problem is that double spacing after a period is now incorrect but it is burned into my brain and I can’t get it out. There is no longer a need to type a double space after a period. In the days of typewriters a double space after a sentence made it much easier to read because most typewriters used “mono spaced fonts”

This article explains it all: http://www.slate.com/id/2281146/

I’ve been trying to break this habit for a while but it is difficult since I learned to type when I was so young. I didn’t even realize double spacing was incorrect until more recently using things like Tumblr which can get screwed up if you double space. It is making me a little crazy but I’m getting better at it.