| 10 | Specification, estimating, drawing, instruction, courses |
| 101 | Contract/specific. work, general design, model testing |
| 109 | Maintenance systems, instruction material |
| 11 | Insurance, fees, certificates, representation |
| 12 | Quality assurance, general work, models |
| 121 | Quality assurance, planning, work preparation |
| 381 | Sounding, surveil. and operating equipment for cargo systems |
| 542 | Office equip. and spec. furniture in wheelh., chart and radior. |
| 792 | Common automation equipment, engine room alarm systems |