| Subject | English | Korean |
| math. | average extra defectives limit | 평균여분불량수한계 |
| comp., MS | extra-bold | 엑스트라볼드 (Having a font weight that corresponds to a weight class value of 800 according to the OpenType specification) |
| comp., MS | extra-light | 엑스트라라이트 (Having a font weight that corresponds to a weight class value of 200 according to the OpenType specification) |
| math. | extra period change over design | 추가된 시간 변환 디자인 |
| math. | extra-Poisson variation | 추가 포아송 변량 |
| comp., MS | Extras Library | Extras 라이브러리 (A renaming of the Vista Program Library experience that showcases and allows quick access to installed Media Center Extras) |