The HP 9000 is a line of Unix-based business
servers from Hewlett-Packard (HP) with server models that span enterprise
applications from the "entry-level" (branch or department-level computers,
Web hosting servers, and so forth) through the midrange with needs for handling
advanced enterprise resource planning (ERP) and analytical customer resource
management (CRM) up to its high-end servers for very computing-intensive
applications. Within the entry-level, midrange, and high-end categories,
a customer can choose one of several "classes" of server. In all cases,
the operating system is HP-UX.