| Subject | English | Bulgarian |
| comp., MS | Internet Protocol security | Защита на интернет протокол (A set of industry-standard, cryptography-based services and protocols that help to protect data over a network) |
| commun., IT | Internet Protocol Television | телевизия през интернет протокол |
| gen. | Internet Protocol Television | IP телевизия |
| comp., MS | Internet Protocol version 4 | Интернет протокол версия 4 (An Internet Protocol that has 32-bit source and destination addresses. IPv4 is the predecessor of IPv6) |