| Subject | English | Korean |
| comp., MS | free slack | 여유 시간 (The amount of time that a task can slip before it delays another task) |
| comp., MS | slack space | 틈새 공간 (The unused area outside of the boot sector in sector 0 of a partitioned data storage device) |
| IT | slack time float | 여유 시간 |
| comp., MS | total slack | 전체 여유 시간 (The amount of time that a task can slip before it delays the project) |