The New World Translation of the Holy Scriptures (NWT) is a translation of the Bible published by the Watch Tower Bible and Tract Society; it is used and distributed by Jehovah's Witnesses. The New Testament portion was released first, in 1950, as The New World Translation of the Christian Greek Scriptures, with the complete New World Translation of the Bible released in 1961.
It is not the first Bible to be published by the Watch Tower Society, but it is its first original translation of ancient Biblical Hebrew, Koine Greek, and Old Aramaic biblical texts. Although commentators have said a scholarly effort went into the translation, critics have described it as "biased".
... summary obtained from Wikipedia