| Subject | English | Dutch |
| scient. | unary operation | unaire operatie |
| IT, tech. | unary operation | monadische bewerking |
| IT, tech. | unary operator | monadische operator |
| IT, tech. | unary operator | monadisch bewerkingsteken |
| comp., MS | unary operator | unaire operator (An operator that takes only one operand, for example, the increment (++) operator) |
| IT | unary relation | unaire relatie |