| Cable | Coffee | Conveyors |
| Calendars | Coin | Copying |
| Candles | Cold Rooms | Corrosion |
| Carbides | Color | Cosmetics |
| Carbon | Commodity | Cranes |
| Cash Registers | Communication | Credit |
| Catering | Compact Disc | Crockery |
| Cement | Compressors | Crystals |
| Chains | Computers | Curtains |
| Chemical | Concrete | |
| Chocolate | Confectionery | |
| Clean Room | Conference | |
| Cleaning | Containers | |
| Clothing | Contractors | |
| Coating | Controls |