the of in to at (unless they are the first word)

All articles, definite and indefinite as well as all prepositions are uncapitalized unless they are first letter used.

of, and, a, to, the, as, on... there are probably more Generally it's the shoter word that isn't the subject of the sentence, for example, 'It' in "Some Like It Hot" is capitalised because it's the subject of the sentence (I think)

Hello there, I was looking for the very same thing you were, so I thought I would add a couple of things. First, a website I found rather useful: http://www.reference.com/search?q=capitalization About halfway down the article is a table and below it some interesting information. I quote: "Among U.S. publishers, it is a common typographic practice to capitalize additional words in titles. This is an old form of emphasis, similar to the more modern practice of using a larger or boldface font for titles. Most capitalize all words except for internal closed-class words, or internal articles, prepositions and conjunctions. Some capitalize longer prepositions such as 'between', but not shorter ones. Some capitalize only nouns, others capitalize all words. This family of typographic conventions is known as title case." Seeing as I was trying to compile a list for a program which would batch rename all my files to approximately this style, I came up with this list which is not comprehensive, I'm sure, but good enough for me at this point in time (until I find another word to add to the list in my program): Of And An The By To As In On With At For A From I hope this is helpful to whoever stumbles upon it, Brian