| Subject | English | Lithuanian |
| nucl.phys. | protection system | apsaugos sistema |
| environ. | protection system A series of procedures and devices designed to preserve people, property or the environment from injury or harm | apsaugos sistema |
| environ. | stationary fire protection system | stacionari gaisro gesinimo sistema |
| obs., environ. | stationary fire protection system | stacionari priešgaisrinė sistema |