One or two spaces after a period? What say you?

Question

Answer 1

I was always taught to put one

Answer 2

Only one but many times before I didn't even put any space between the dot and first letter.

Answer 3

Two spaces

Answer 4

I prefer one space.

Answer 5

Generally speaking, I use two spaces after a period and one space after a comma, colon, semi-colon, and other forms of punctuation.

Comments

I should have worded this a little better.  I also use two spaces after a question mark and exclamation point.  Sorry about the confusion in my first comment.

Answer 6

I only used to leave a single space after a period.

Answer 7

Back in the days when we were all using typewriters it was preferred practice to us two spaces. Now that we have computers with their advanced fonts, a single space is preferred/

Typewriters used a standard size for every letter.

Computers use proportional spacing.