NABET organized the technicians and engineers at two of the major broadcast networks (back when there were three) NBC and ABC. For some reason CBS was organized by IBEW, the International Brotherhood of Electrical workers.
That's how I became a brother in good standing of the IBEW back when I worked at a studio that was part of CBS Records, which was part of CBS Inc at the time.
Of course CBS Records, which included Columbia and Epic, was sold to SONY some years later, and is now SONY/BMG.
Anyway, your NABET label only indicates that your tape was made by a union engineer.
