It becomes a habit when you write according to standard rules. "The small numbers, such as whole numbers smaller than ten, should be spelled out." http://www.

It becomes a habit when you write according to standard rules. "The small numbers, such as whole numbers smaller than ten, should be spelled out." http://www.dailywritingtips.com/10-rules-for-writing-numbers-and-numerals/ http://www.dailywritingtips.com/10-rules-for-writing-numbers... Edit: Also, I prefer to use proper English (to the best of my abilities) even when addressing my computers.