In August 1999, the Twelfth Workshop on Languages and Compilers for P-
allel Computing (LCPC) was hosted by the Hierarchical Tiling Research
group from the Computer Science and Engineering Department at the
University of California San Diego (UCSD). The workshop is an annual
international forum for leading research groups to present their current
research activities and the latest results. It has also been a place for
researchers and practitioners to - teract closely and exchange ideas
about future directions. Among the topics of interest to the workshop
are language features, code generation, debugging, - timization,
communication and distributed shared memory libraries, distributed
object systems, resource management systems, integration of compiler and
r- time systems, irregular and dynamic applications, and performance
evaluation. In 1999, the workshop was held at the International
Relations/Paci c Studies Auditorium and the San Diego Supercomputer
Center at UCSD. Seventy-seven researchers from Australia, England,
France, Germany, Korea, Spain, and the United States attended the
workshop, an increase of over 50% from 1998.