| Subject | English | Spanish |
| IT | null modem | módem nulo |
| IT | Null Modem | módem nulo |
| comp., MS | null modem | módem nulo (Special cabling that eliminates the modem's need for asynchronous communications between two computers over short distances. A null modem cable emulates modem communication) |
| IT | null modem cable | cable de módem nulo |