Translation is the art of recomposing or of finding an analogous substitute of a work in another language without losing the meaning and flavor of the original one. Because of laboriousness of translation, machine translation is widely used. Unedited machine translation is widely available on web.
However, it ignores the fact that communication in human- language is context-embedded; hence, the use of human translators for contextual comprehension is inevitable and more reliable. CAT, Computer- assisted translation combines the above two aspects wherein a machine enhances the productivity of a human translator.