It was designed by MSFC but manufactured by IBM in their factory at Huntsville, and flew on all Saturn IB and Saturn V launches.

The System p5 now encompasses the IBM OpenPower product line.

All IBM System p5 and IBM eServer p5 machines support DLPAR ( Dynamic Logical Partitioning ) with Virtual I / O and Micro-partitioning.

* IBM System p5 505

* IBM System p5 505Q

* IBM System p5 510 ( 9110-510 ) 1-2 POWER5 CPUs

* IBM System p5 510Q

* IBM System p5 520 ( 9111-520 ) 1-2 POWER5 CPUs

* IBM System p5 520Q

* IBM System p5 550 ( 9113-550 ) 1-4 POWER5 CPUs

* IBM System p5 550 Express ( 1. 9G, 2. 1G )

* IBM System p5 550Q

* IBM System p5 550Q Express ( 4-8 cores POWER5 + CPUs ) ( Model 9133-55A )

* IBM System p5 560Q

* IBM System p5 570 ( 9117-570 ) 2-16 POWER5 CPUs

* IBM System p5 575 ( 9118-575 ) 8-16 POWER5 CPUs

* IBM System p5 590 ( 9119-590 ) 8-32 POWER5 CPUs

* IBM System p5 595 ( 9119-595 ) 16-64 POWER5 CPUs

* System p5, family of servers and workstations created in 2005 as part of IBM System p

IBM uses the POWER5 + in their System p5 510Q, 520Q, 550Q and 560Q servers.

IBM supports Linux on Power with its line of Power servers, which has gone through an evolution of names ; eServer p5 series, RS / 6000, P Series, System P, and as of April 2008, IBM Power Systems.

This technical leadership and the rivalry with IBM was emphasized when the Systempro server was launched in late 1989-this was a true server product with standard support for a second CPU and RAID, but also the first product to feature the EISA bus, designed in reaction to IBM's MCA ( MicroChannel Architecture ).

HP was also unable to compete effectively with IBM in the high-end server market.

IBM claimed that its newer mainframes can reduce data center energy costs for power and cooling, and that they could reduce physical space requirements compared to server farms.

IBM also released server editions of Warp 3 and Warp 4 which bundled IBM's LAN Server product directly into the operating system installation.

The latest IBM version is 4. 52, which was released for both desktop and server systems in December 2001.

The success of SPARC renewed interest within IBM, which released new RISC systems by 1990 and by 1995 RISC processors were the foundation of a $ 15 billion server industry.

XFree86 originated in 1992 from the X386 server for IBM PC compatibles included with X11R5 in 1991, written by Thomas Roell and Mark W. Snitily and donated to the MIT X Consortium by Snitily Graphics Consulting Services ( SGCS ).

IBM System i 570 server ( As of 2006 )

It supports security, communications, and web-based applications which can be executed inside the optional IBM WebSphere Application Server or as PHP / MySQL applications inside a native port of the Apache web server.

Other features include an integrated DB2 database management system, a menu-driven interface, multi-user support, non-programmable terminals ( IBM 5250 ) and printers, security, communications, client – server and web-based applications.

The IBM System i also supports common client – server systems such as ODBC and JDBC for accessing its database from client software such as Java, Microsoft. NET languages and others.

The Informix server supports the object-relational model, which has permitted IBM to offer extensions that support data types that are not a part of the SQL standard.

IBM consistently left VMX out of their POWER microprocessors, which were intended for server applications where it was not very useful.

Compared to the more powerful but still entry-level IBM Multiprise 2000 and 3000 mainframes ( also from the 1990s ), Hercules on typical X86 hardware would be considered a mid-range server in performance terms.

IBM purchased the company in 1995 for $ 3. 5 billion, primarily to acquire Lotus Notes and to establish a presence in the increasingly important client – server computing segment, which was rapidly making host-based products like IBM's OfficeVision obsolete.

Lotus's dominant groupware position attracted IBM, which needed to make a strategic move away from host-based messaging products and to establish a stronger presence in client – server computing, but it also soon attracted stiff competition from Microsoft Exchange Server.

For several years EISA and MCA battled it out in the server arena, but in 1996 IBM effectively conceded defeat when they themselves produced some EISA bus servers.

Expansion cards for the Micro Channel bus typically targeted high-end graphic workstation or server requirements, with SCSI, Ethernet, IBM 5250 and IBM 3270 connections.

IBM DB2 is a relational model database server developed by IBM.

: When IBM bought Sequent, ... it lacked the size and resources to compete with Sun and Hewlett-Packard Co. in the Unix server market ....

Robert Stephenson, who headed the server group at IBM, saw acquiring Sequent as the best route to make IBM competitive in the market for large Unix servers where Sun was gobbling up market share.