| Subject | English | Bulgarian |
| transp., avia. | control area | контролиран район |
| energ.ind., el. | control area | контролна зона |
| environ. | SOx Emission Control Area | зона за контрол на емисиите на серни оксиди |
| comp., MS | system control area | системна контролна област (An area in the taskbar that shows icons for network connectivity, volume control, clock, and on laptops and Tablet computers, the battery) |