Special Interest Groups (SIGs) are organized by subject areas rather than by platform. The Applications and Programming Environment SIG deals naturally with Applications and Programming Environments issues. The Systems Support SIG covers topics related to Operations, Systems & Integration, and Operating Systems. The User Support SIG deals with issues related to User Services. This year, a new XTreme SIG works very closely with Cray, under Non-Disclosure Agreements, to provide valuable input into the Cray XT system development cycle.

The contacts for CUG Special Interest Groups, are shown in the table below.

David Hancock, CUG Vice-President and Conference Program Chair, dyhancoc@indiana.edu

Programming Environments, Applications and Documentation
Chair: Helen He (NERSC) yhe@lbl.gov Deputy Chair: Neil Stringfellow (CSCS) nstring@cscs.ch Deputy Chair: Rolf Rabenseifner (HLRS) rabenseifner@hlrs.de	Cray Inc. SIG Liaison Applications: Jef Dawson jef@cray.com Programming Environments: Luiz DeRose ldr@cray.com Documentation: Wayne Kugel wjkugel@cray.com
Systems Support
Chair: Cary Whitney (NERSC) whitney@nersc.gov Deputy Chair: Joni Virtanen (CSC) Joni.Virtanen@csc.fi	Cray Inc. SIG Liaison Systems & Integration: Steve Johnson sjj@cray.com Operating Systems: Charlie Carroll charliec@cray.com Operations: Steve Johnson sjj@cray.com
XTreme Systems
Chair: Tina Butler (NERSC) tbutler@nersc.gov Deputy Chair: Lee Whatley (NAVOMSRC) lwhatley.ctr@navo.hpc.mil	Cray Inc. SIG Liaison Vito Bongiorno vb@cray.com