The modules subscribed to are:
| GBM 14 | Manufacturing Engineering | 2763 documents |
| GBM 17 | Electrical Engineering In General | 716 documents |
| GBM 18 | Electrical Components | 2223 documents |
| GBM 19 | Electrical Accessories, Switchgear & Control gear | 1837 documents |
| GBM 20 | Electric Lamps, Power Generation, Distribution & Storage | 2117 documents |
| GBM 23 | Telecommunication | 4386 documents |
| GBM 24 | Information Technology - Software & Networking | 4052 documents |
| GBM 50 | Building Installations & Finishing | 2487 documents |