ACLS Automated Cartridge System Library Software (Science Technology Corporation)
AIX Advanced Interactive Executive
API Application Program Interface
DCE Distributed Computing Environment
GSS Generic Parallel File System
GPFS IBM General Parallel File System
HPSS High Performance Storage System
IBM International Business Machines Corporation
LANL Los Alamos National Laboratory
LLNL Lawrence Livermore National Laboratory
NASA National Aeronautics and Space Administration
ORNL Oak Ridge National Laboratory
IEEE Institute of Electrical and Electronics Engineers
PFTP Parallel File Transfer Protocol
RISC Reduced Instruction Set Computer
SNL Sandia National Laboratories
TCP Transmission Control Protocol
XDSM X/Open Data Storage Management
XFS File system by SGI (not actually an acronym)