| Subject | English | Bulgarian |
| comp., MS | Data Encryption Standard | стандарт за шифроване на данни DES (An encryption algorithm that uses a 56-bit key and maps a 64-bit input block to a 64-bit output block. The key appears to be a 64-bit key, but one bit in each of the eight bytes is used for odd parity, resulting in 56 bits of usable key) |
| health., pharma. | Data Exchange Standard | Стандарт за обмен на данни |
| construct. | standard data | нормативни данни |