Short for whatever. Used when you couldn't care less, when you don't even care enough to write the whole word.

With regard(s) to

With special guest. Used by bands or other performance artists to highlight a featured performance or contribution by a guest.

W.3 means whatever

Used to accept or agree to a task, event, or sexual advance. Symbolises a pouted expression. Mostly used via instant messenger, but can be spelt out in person. i.e. "dubble-u semi colon"

Work At Home

Work At Home.
A variant of WFH, sometimes deemed clearer, sometimes not much clearer.