Interesting Acronyms

In the adventures of perusing the interwebs, I often find things of interest.  Other times, things of oddness. 
Something I found that interested me - Background - I keep my threads in a bag (at work) and a glass (at home) for approximately a year.  I am going to make an ornament with it, but since I have been doing a lot of dark stitching (mostly black) I wanted to add a bit of color to it.  If you don't know, these old ratty threads have a name, which is ORT.  So, for future reference I will refer to my bag and glass as my ORT jar.  In my perusing different blogs, I found a lot of people mentioning a tusal.  They all had pictures of their ort jars and stated it was their monthly tusal update.  So, I finally found out what it is, and it is explained here: TUSAL 
In short tusal means totally useless stitch a long.  A nifty acronym if I've ever seen one.
I have joined, so the next full moon, which I believe is the 25th of this month, I will be combining my ort jars and posting a pic. 

Quick question, what does this acronym mean?  TLA

Have a great day everyone!