| Subject | English | Korean |
| math. | error of third kind | 제3종 오류 |
| comp., MS | third-level domain | 세 번째 수준 도메인 (" A DNS domain located directly beneath another domain name (the parent domain) in the namespace tree. For example, "example.microsoft.com" would be a subdomain of the domain "microsoft.com".") |
| comp., MS | third-party driver | 타사 드라이버 (A driver created or provided by an entity outside Microsoft (distributed by a developer or an OEM)) |
| IT | third-party review | 제3자 검토 |
| comp., MS | third-party update | 타사 업데이트 (An update published by a company other than Microsoft) |