Possible Duplicate: What is the proper way to write the plural of a single letter? (another apostrophe question) Plurals of acronyms, letters, numbers — use an apostrophe or not? Take for ...
When writing an address, I wonder which comes first, the apartment number, or the house number and street name? Thanks! For example: 1234 Charles ST APT A Hollywood, CA 54321 or APT A, ...