| Subject | English | Korean |
| comp., MS | optimistic concurrency | 낙관적 동시성 (A method of managing concurrency by using a cached object's version information. Because every update to an object changes its version number, using version information prevents the update from overwriting someone else's changes) |
| comp., MS | optimistic duration | 최적 기간 (The best-case possibility for the total span of active working time expected for a task, that is, the amount of time from the optimistic start to optimistic finish of a task) |