Not standard, but abbreviations likely seen in my posts and maybe in other places as well. After 5 years of blogging, I'm tired of redefining abbreviations I use over and over but wouldn't be commonly seen.  When you come across a new abbreviation or acronym, check this page first, then Google it. I can't promise totally satisfactory results, but I will tryy.
JSM  Joyce Simmons Murphy - pattern and tailoring notions company and my favorite of all time Trouser Pattern
WB: Waist Band
WSS: Water Soluble Stabilizer
WST:  Waster Soluble Thread