for Series 500 hardware. 3.x (1988) HP 9000 Series 600/800 only. Note: 2.x/3.x (for Series 600/800) were developed in parallel with 5.x/6.x (for Series 200/300/400), so, for example, 3.x was really contemporary with 6.x. The two lines were united at HP-UX 7.x. 6.x (1988) Support for HP 9000 Series 300 only. Introduced sockets from 4.3BSD. This version (together with 3.x) also introduced the above-discussed context dependent files (CDF), which were removed in release 10 because of their security risks. The 6.2 release added X11, superseding HP Windows/9000 and X10. 6.5 allowed Starbase programs to run alongside X11 programs. 7.x (1990) Support for HP 9000 Series 300/400, 600/700 (in 7.03) /800 HP systems. Provided OSF/Motif. Final version to include the HP Windows/9000 windowing system. 8.x (January 1991) Support for HP 9000 Series 300/400 600/700/800 systems. Shared libraries introduced. 9.x (July 1992) 9.00, 9.02, 9.04 (Series 600/800), 9.01, 9.03, 9.05, 9.07 (Series 300/400/700), 9.08, 9.09, 9.09+ (Series 700 only), 9.10 (Series 300/400 only). These provided support for the HP 9000 Series 300, 700 and 800 systems. Introduced System Administration Manager (SAM). The Logical Volume Manager (LVM) was presented in 9.00 for the Series 800. Adopted the Visual User Environment desktop. 10.0 (1995) This major release saw a convergence of the operating system between the HP 9000 Series 700 (workstation) and Series 800 (server) systems, dropping support for previous lines. There was also a significant change in the layout in the system files and directories, based on the AT&T UNIX System V Release 4 standard. Applications were removed from /usr and moved under /opt; startup configuration files were placed under /etc/rc.config.d; users were moved to /home from /users. Software for HP-UX was now packaged, shipped, installed, and removed via the Software Distributor (SD) tools. LVM was also made available for Series 700. 10.10 (1996) Introduced the Common Desktop Environment. UNIX95 compliance. 10.20 (1996) This release included support for 64-bit PA-RISC 2.0 processors. Pluggable Authentication Modules (PAM) were introduced for use within CDE. The root file system could be configured to use the Veritas File System (VxFS). For legacy as well as technical reasons, the file system used for the boot kernel remained Hi Performance FileSystem (HFS, a variant of UFS) until version 11.23. 10.20 also supported 32-bit user and group identifiers. The prior limit was 60,000, or 16-bit. This and earlier releases of HP-UX are now effectively obsolete, and support by HP ended