My background is in user assistance and documentation that uses plain language and accessibility. Here are some guides I use when I have a question.
I generally follow Microsoft Writing Style Guide. I use this for computer, interface, and software terms, unless otherwise noted. The online site is OK, but try and find the 4th edition of the printed guide. The other important resource I use are:
- The Chicago Manual of Style, 16th ed.
- Plain Language Action and Information Network
- Diversity Style Guide
- The Punctuation Guide , for all things punctuation.