| Subject | English | Hungarian |
| math. | non-null hypothesis | ellenhipotézis |
| math. | non-null hypothesis | nem nullhipotézis |
| patents. | null and void | semmis |
| comp., MS | null character | NULL karakter (" 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 | nullmező (" 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.") |
| math. | null hypothesis | nullhipotézis |
| comp., MS | null modem | nullmodem (Special cabling that eliminates the modem's need for asynchronous communications between two computers over short distances. A null modem cable emulates modem communication) |
| math. | null recurrent state | átmeneti állapot |
| math. | null recurrent state | megismétlödö null-állapot |
| life.sc. | null segregant | negatív szegregáns |