| Subject | English | Korean |
| stat. | non-null hypothesis | 대립가설 |
| math. | non-null hypothesis | 대립대안가설 |
| comp., MS | null character | null 문자, Null 문자 (" A character code with a null value; literally, a character meaning "nothing." Although it is real in the sense of being recognizable, occupying space internally in the computer, and being sent or received as a character, a NUL character displays nothing, takes no space on the screen or on paper, and causes no specific action when sent to a printer. In ASCII, NUL is represented by the character code 0. ") |
| comp., MS | null field | Null 필드 (" A field containing a Null value. A null field isn't the same as a field that contains a zero-length string (" ") or a field with a value of 0.") |
| stat. | null hypothesis | 영가설 |
| stat. | null hypothesis | 귀무가설 |
| math. | null hypothesis | 귀무가설, 영가설 |
| comp., MS | null key | Null 키 (A null value that is encountered in a key column) |
| comp., MS | null modem | Null 모뎀 (Special cabling that eliminates the modem's need for asynchronous communications between two computers over short distances. A null modem cable emulates modem communication) |
| comp., MS | null object | null 개체 (An object with no members) |
| math. | null recurrent state | 영재귀상태, 귀무재귀상태 |
| comp., MS | null reference | null 참조 (In C++, a reference that has not been assigned an object) |