Re: It may be a US "standard", but...
The 2 space 'rule' for typewriters came about because there was no way to properly space sentences on a typewriter. So 2 spaces became the rule as the actual spacing used in books is about 1.5 spaces back then and now. This was the rule in the US since at least the mid 50s. It may have been different earlier and in other places.
Biting the hand that feeds IT
