STA is an acronym for the Stage Technician's Association. This is the name often given to societies at university which coordinate the teching of theatre productions. Manned by techies, the STA will often be called upon to run the backstage portions of many different kinds of shows.

Our university (Bristol, UK) STA recently produced a T-Shirt with the following on the back:

At the dawn of the 12st century, a crack technical unit was sent to university for degrees they didn't commit to. They promptly excaped from a maximum security lecture theatre to the Clifton underground. Today, still unwanted by the University, they survive as techies of fortune. If you have a problem, if no one else can help, and if you can find them, maybe you can hire THE STA-TEAM