| 1 | The two sets of traffic lights were out of phase. | |
| 2 | The film does not synchronize with sound. | |
| 3 | The two sets of traffic lights were out of phase (ie did not show the same change at the same time) and several accidents occurred. | |
| 4 | At this point the threads must be synchronized before continuing with the next phase. | |
| 5 | A specification for the format and relative timing of information exchanged between communicating parties. |