Please don't resurrect ancient threads just to add a commentary. In any event, the double-spacing only concerned readability in an era of fixed-width fonts (which is all typewriters can produce). The key-sticking problem actually concerned what would happen if the most-commonly used keys were too close together on the keyboard and explains the traditional QWERTY keyboard layout.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]