Useful Library of Congress Call Numbers
| Subject | Call Number |
| Electrical Engineering | TK |
| Electric Motors | TK |
| National Electrical Code | TK |
| Metal Manufactures | TS200-770 |
| Mechanical Engineering | TJ |
| Welding | TS |
| HVACR | TH7005-7699 |
Electricity for Refrigeration, Heating & Air Conditioning
