These acronyms and abbreviations are the most commonly asked about:

AMHS	Automated Material Handling System
CDL	Commercial Driver's License
GRC	Galvanized Ridge Conduit
I&C	Instruments & Controls
HVAC	Heating, Ventilating & Air Conditioning
I-9	Immigration Form the Employer must maintain
OSHA	Occupational Safety & Health Administration
PLC	Programmable Logic Controller
TI	Tenant Improvement
VFD	Variable Frequency Drive

These acronyms are most common to the Sound and Communications industry, but may apply to others.  Many are also part of larger corporations; i.e. Honeywell, Bosch, etc.

Many of them are brand names, check with the Training Center or go online and look for the manufacturer's website.