| Answer | Crossword Clue |
|---|---|
| emails | system for sending messages between computers |
| system for sending messages between computers | |
| semaphore | A system of sending messages by holding the arms or two flags or poles in certain positions according to an alphabetic code |
| midis | Musical Instrument Digital Interface: a standard means of sending digitally encoded information about music between electronic devices, as between synthesizers and computers |
| midi | Musical Instrument Digital Interface: a standard means of sending digitally encoded information about music between electronic devices, as between synthesizers and computers |
