Hi there! I'm new to forum and trying to get up to speed. I have seen many abbreviated terms used and would like to have a list of or a link to what some of the more common ones mean. So far, OBS is driving me nuts. My best guess is Otherwise Bone Stock, but a search hasn't yielded the result, as of yet. Thanks for any help in advance. I look forward to a lot of good info and advise in the future.