| Subject | English | Korean |
| comp., MS | back door | 백도어 (A hardware or software-based hidden entrance to a computer system that can be used to bypass the system's security policies) |
| comp., MS | lamp access door | 램프 액세스 도어 (The metal door in the I/O connections area that you must remove to access the lamp assembly) |
| IT | trap door | 트랩 도어 |