| Subject | English | Bulgarian |
| IT, geogr. | Geographic Information System | географска информационна система |
| environ. | geographic information system An organized collection of computer hardware, software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information that can be drawn from different sources, both statistical and mapped | географска информационна система |
| forestr. | GIS geographic information system | географски информационни системи |