Technology UNIX® SVR4, Symmetric Multiprocessor (SMP) multithreaded, with fine-grained kernel locking Product Span Single OS for all R4000, R4400, R4600 and R8000 based systems, desktop to datacenter to supercomputer Suggested Memory 24MB or greater File Systems VFS (vnode) interface, EFS for 8GB file systems, XFS(tm)  File System support for 1TB file systems, NFS*, lv for striping mirroring*, and concatenation, FAT (MSDOS) and HFS (Macintosh®) support on removable devices; CD support for ISO9660 and Rockridge format Loadable Device Drivers SVR4.0 MP DDI/DKI, loadable drivers Terminal Support STREAMS, international support IPC SVR4 messages, semaphores, shared memory, FIFOs; BSD sockets Real-Time Support Preemptible kernel, non-degrading priorities, memory lockdown, high-resolution timers, multithreaded application support, queued signals, deadline scheduling* User MP Facilities Lightweight process parallelism, memory-based synchronization, processor affinity, parallelizing compilers (C** and Fortran*) Distributed Computing ONC 4.1* (NFS, NIS, RPC, automount, lockd, etc.) ONC+* (NFS version 3 protocol, Caching File System (CFS))

Networking Sockets TCP/IP stack, TLI***, DLPI driver interface; Ethernet, SLIP, PPP, HiPPI*;, FDDI*; interfaces supported Network Management SNMP with MIB II. NetVisualyzer(tm)*, Cabletron SPECTRUM(tm) Network Management* System Connectivity Products SNA(tm) (3270, LU6.2)*, DECnet(tm)*, LAT*, OSI Transport* System Administration Visual system administration toolchest, graphic system monitor IRIXpro(tm)* system administration tools, Performance Co-Pilot(tm)* performance management tools Security Auditing, shadow passwords, password aging, expanded login options, B1 version available* Backup/Restore Dump/restore, bru, cpio, tar; IRIS NetWorker(tm) for IRIX* Printing Support Lpd, lpsched, IRIS Impressario(tm) printer management system* Internationalization XPG4-compliant message catalogs locale support for currency, date, etc., wide character support, country kits* Graphics Support OpenGL, Performer(tm)*, Inventor(tm)*, ImageVision Library(tm)*, X11R6, PEX***, IRIX IM(tm), Display PostScript(tm)*** Software Development Developer Magic(tm) ProDev Workshop*, ANSI C*, C++*, Fortran 77*, Fortran 90*, Pascal***, ADA*** Usability Features Indigo Magic(tm) user environment, Showcase(tm) presentation authoring tool, IRIS Inventor(tm), IRIS InSight(tm) SGML document reader and on-line documents