| Subject | English | Estonian |
| commer. | Consumer Protection Cooperation System | tarbijakaitsealase koostöö süsteem |
| tech., el. | crash protection system | avarii ohutussüsteem |
| coal., mech.eng. | overpressure protection system | ülerõhukaitsesüsteem |
| transp., mil., grnd.forc., el. | power system protection | elektrikaitseseadmed |
| environ. | protection system A series of procedures and devices designed to preserve people, property or the environment from injury or harm | kaitsesüsteem |
| h.rghts.act. | Protocol No. 14 to the Convention for the Protection of Human Rights and Fundamental Freedoms, amending the control system of the Convention | inimõiguste ja põhivabaduste kaitse konventsiooni protokolli nr 14, millega muudetakse konventsiooni kontrollsüsteemi |
| transp. | side underrun protection system | külgmine allasõidutõke |
| social.sc. | social protection system | sotsiaalkaitsesüsteem |
| environ. | stationary fire protection system | paikne tuletõrjesüsteem |
| comp., MS | System Protection | Süsteemikaitse (A Windows technology that protects OS resources (files, folders registry keys) and prevents applications and administrators from making changes to a computer's resources in an arbitrary way) |