I thought I would solicit some opinions/facts from the knowledgeable and literate among this fine community (butter up - check). Here are just a few grammar questions that I would like to pose to you in the hopes of getting your feel for their use. I'll try to stay away from things that are obviously wrong, but I may not be successful. I certainly don't know the terminology of many of the items below, so feel free to enlighten me. First - trailing commas Whenever I'm listing several elements in a sentence, I typically use ", item, item, and item". I have seen many instances where people use "item, item and item". Which is correct or preferred? Second - possessive before an acronym The use of "a" or "an" before a word is very simple until it is an acronym. I feel compelled to place an "an" before XDSL or LD because of the vowel sound the acronym presents. So which of the following is better: "Place it over an LD asset" or "Place it over a LD asset"? Third - pluralization of acronyms Perhaps I'm just set in my ways, but it just feels wrong to pluralize ancronyms that represent nouns with an " 's ". For example, LASERs looks more correct to me than LASER's. I have seen many people who do the opposite. Which is correct or preferred? Also, Feel free to correct me on any grammar errors in this post as well. The more anal you are about this the better all of my writing will be, so let it rip! Thanks!