| ACL | Access Control List |
| ARP | Address Resolution Protocol |
| ATLAS | Automatically Tuned Linear Algebra Software |
| BIOS | Basic Input Output System |
| BIST | Built In Self Test |
| BLAS | Basic Linear Algebra Subprograms |
| CEC | Central Electronic Complex |
| CFM | Cluster File Manager |
| CHRP | Common Hardware Reference Platform |
| CSM | Cluster Systems Management |
| DCEM | Distributed Command Execution Manager |
| DHCP | Dynamic Host Control Protocol |
| DNS | Domain Name Service |
| dsh | Distributed shell |
| DVI | Digital Video Interface |
| ESSL | Engineering and Scientific Subroutine Library |
| EVLOG | Enterprise Event log |
| FTP | File Transfer Protocol |
| GCC | GNU Compilers Collection |
| GFLOPS | Billion Floating Point Operations Per Second |
| GPFS | General Parallel File System |
| HA | High Availability |
| HBA | Host Based Authentication |
| HMC | Hardware Management Console |
| HPC | High Performance Computing |
| HPL | High Performance Linpack |
| HTTP | HyperText Transfer Protocol |
| IBM | International Business Machines Corporation |
| IPL | initial program load |
| ITSO | International Technical Support Organization |
| JBOD | Just a Bunch Of Disks |
| JDK | Java Development Kit |
| LAM | Local Area Multicomputer |
| LAN | local area network |
| LAPACK | Linear Algebra PACKage |
| LELA | Linux Error Log Analysis |
| Linpack | Linear Algebra PACKages |
| LPAR | Logical Partition |
| LVM | Logical Volume Manager |
| LVS | Linux Virtual Servers |
| Mbps | Mega bits per second |
| MFLOPS | Million Floating Point Operations Per Second |
| MPI | Message Passing Interface |
| NAT | Network Address Translation |
| NetPIPE | Network Protocol Independent Performance Evaluator |
| NFS | Network File System |
| NNTP | Network News Protocol |
| NSD | Network Shared Disk |
| NVRAM | Non-Volatile RAM |
| ODBC | Open DataBase Connectivity |
| OMP | OpenMP |
| PCI | Peripheric Component Interconnect |
| PESSL | Parallel Engineering and Scientific Subroutine Library |
| PHP | Preprocessor Hypertext Protocol |
| POST | Power-on Self Test |
| ppc | Power PC |
| PReP | PowerPC Reference Platform |
| PSSP | Parallel Systems Support Program |
| PVFS | Parallel Virtual File Systems |
| PVM | Parallel Virtual Machine |
| RAID | Redundant Array of Independent Disks |
| RHAS | RedHat Advanced Server |
| RM | Resource Manager |
| RMC | Resource Monitoring and Control |
| RPM | RedHat Package Manager |
| RS6000 | IBM Risk System 6000 |
| RSCT | Reliable Scalable Cluster Technology |
| RTAS | Run Time Abstraction Service |
| SAN | Storage Area Network |
| SCSI | Small Computer System Interface |
| SLES | SuSE Linux Enterprise Server |
| SMP | Symmetrical Multiple Processor |
| SMS | Systems Management Services |
| SMS | Software Maintenance System |
| SMTP | Simple Mail Transfer Protocol |
| SP2 | System Power Parallel |
| SPOF | Single Point of Failure |
| SRC | System Resource Controller |
| SSH | Secure Shell |
| SSL | Secure Sockets Layer |
| TCP | Transmission Control Protocol |
| TFTP | Trivial File Transfer Protocol |
| TLES | TurboLinux Enterprise Server |
| TSM | Tivoli Storage Manager |
| VACPP | VisualAge C++ |
| VFS | Virtual File System |
| VLAN | Virtual Local Area Network |
| VNC | Virtual Network Computing |
| VSIPL | Vector Signal Image Processing Package Library |
| WCOLL | Working Collective |
| XML | Extensible Markup Language |
| XML | eXtended Markup Language |
| YABOOT | Yet Another BOOT loader |
| YAST | Yet Another Setup Tool |