What does TROC stand for?

Tactical Relay Operations Center (SAUS)

Trichloroethoxycarbonyl (SAUS)

Tritium Removal with Organic Compound - Nuclear energy

Trocadero - London (DSUE)

Trochiscus - Lozenge - Pharmacy (ROG)

Trouble Reporting Operations Center - Federal Telecommunications System (GFGA)