| Subject | English | Dutch |
| comp., MS | optimistic concurrency | optimistisch gelijktijdigheidsmodel (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) |
| IT, dat.proc. | optimistic duration | optimistische tijdsduur |
| comp., MS | optimistic duration | optimistische duur (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) |
| gen. | optimistic time estimate | optimistische schatting van tijdsduur |