New computer applications and programming paradigms are constantly emerging to complement new and improving technology. It is essential to understand the characteristics of today's emerging workloads in order to design efficient architectures for them. This one-day workshop, sponsored by IEEE and the Technical Committee on Computer Architecture, will focus on characterizing and understanding modern computer applications commercial and scientific computing. The workshop welcomes submissions on characterization of web server, database, transaction processing, mobil, embedded multimedia, Java, network, and scientific workloads. Studies focusing on abstract models for workloads are also encouraged.