Out of this opportunity evolved a request for me to edit a special issue of the journal Computational Linguistics, to be devoted to MT and, the Editorial Board permitting, to include my COLING paper. So it was that in 1985, Issues 1-3 of Volume 11 presented a collection of papers on MT by most of the active non-commercial principals in the field. Requests for reprints have been voluminous, and at the 1986 CO LING in Bonn these back-issues were in greatest demand at the ACL booth. This book is a collection of all but one of those papers - the fast-paced EUROTRA project's paper having been withdrawn because too many of its technical details were outdated. Minor revisions of the original papers from the other, more mature development projects have been sufficient to bring them up to date. The restricted MT bibliography that I compiled in early 1984, and included as a separate item in the journal, has also been updated to reflect some of the most recent literature.