PC Server range
IBM PC Server 300
IBM PC Server 310 (PCI/ISA)
IBM PC Server 315 (PCI/ISA)
IBM PC Server 320 (PCI/EISA)
IBM PC Server 325 (PCI/EISA)
IBM PC Server 330 (PCI/EISA)
IBM PC Server 500 (MCA)
IBM PC Server 520 (PCI/EISA or PCI/MCA)
IBM PC Server 704 (PCI/EISA)
IBM PC Server 720 (PCI/MCA)
Numbering scheme
300 range for high-volume, entry level servers
500 range for midrange
700 range for high-end.