Welcome to the Quilting Board!
Oh, about the original question. I agree their should be a spot for explanation of abbreviations.
I've not heard those initials before either. Please let us know when you find out!!
A Garmin is a Global Positioning System. Love our Garmin-saved us on many occasions. Nope, neither one of us have those fancy shmancy phones that do everything except wash out your underwear for you.
For the purse pattern and the OTL, I would think if you would have given the name of the purse, designer, or site where you found the pattern, you may have had your answer within the first few posts. Many of us have purse patterns and many of us love perusing the web and finding stuff out. Happy to help if you can give us more info. Not all patterns are written clear-cut.
Just want to give my opinion on abreviations: as a retired RN I have seen my share of other nurses make up their own abreviations when charting that are not even legal!