HP PL Class 450/500/550/600/650/700/750 User Manual page 12

Pentium III processor and supports up to 768MB of system memory. It is
equipped with dual SCSI controllers, single or dual 9GB internal discs,
and the ELSA GLoria Synergy+ graphics subsystem.
Red Hat Linux is a popular open source operating system that gives you
the ability to develop custom tools and applications or select from a
growing number of commercial software and freeware solutions.
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