That wikipedia article was a great read but I have to agree with GP.
> According to the standards taught in secretarial schools in the mid-20th century, a business letter was supposed to have no mistakes and no visible corrections.
Certainly, there were other reasons like speed, repeatability, official-looking, etc... too. Most typewriters wanted to be cheaper and on-demand printing presses. Some even managed variable width fonts! :)
Oh, the original comment is certainly right in spirit, I just wanted to be pedantic.
But I'm not sure why you quote something about the md-20th century, when we are talking about the (many) invention(s) of the typewriter? They were already old and well-established technology at that point in time.
> According to the standards taught in secretarial schools in the mid-20th century, a business letter was supposed to have no mistakes and no visible corrections.
Certainly, there were other reasons like speed, repeatability, official-looking, etc... too. Most typewriters wanted to be cheaper and on-demand printing presses. Some even managed variable width fonts! :)