Languages and Compilers for Parallel Computing : 12th International Workshop LCPC’99 La Jolla CA USA August 4–6 1999 Proceedings This volume constitutes the refereed proceedings of the 12th International Workshop on Languages and Compilers for Parallel Computing LCPC99 held in La Jolla CA USA in August 1999. The 27 revised full papers and 14 posters presented have gone through two rounds of selection and reviewing. The volume offers topical sections on Java low level transformations data distribution high level transformations models array analysis language support and compiler design and cost analysis