Dell
Products and Services: PowerEdge line, others. Runs various Web apps and services. Can be configured for Linux, NetWare, Windows.
www.dell.com
Hewlett-Packard
Products and Services: Several Intel- and Unix-based lines, including the advanced HP 9000 line. Runs various Web applications and services. Can be configured for Linux, Unix and Windows.
www.hp.com
IBM
Products and Services: Several Intel- and Unix-based server lines, including the RS/6000 line. Runs various Web applications and services. Can be configured for Linux, NetWare, OS/400, Unix and Windows.
www.ibm.com
Sun Microsystems
Products and Services: Sun Enterprise Servers. Runs various Web applications and services; configured for Unix.
www.sun.com
