| Subject | English | Korean |
| comp., MS | two-way binding | 양방향 바인딩 (A type of data binding where changes made to the target automatically update the source, and changes to the source automatically update the target. Data binding is always set on the target object) |
| math. | two-way classification | 이원분류 |
| comp., MS | two-way trust | 양방향 트러스트 (A trust relationship between two domains in which both domains trust each other. For example, domain A trusts domain B, and domain B trusts domain A. All parent-child trusts are two-way) |