Interloper SC4 P4 Computer System with 3 ISA slots Mid Tower case with power supply Pentium4 Socket 478 motherboard with 3 ISA slots, 2 PCI and 1 AGP Intel Pentium 4, 2.8GHz CPU 1GB memory - upgradeable to 2GB 80GB hard drive Floppy drive DVD-ROM drive Standard Audio Standard video 10/100 Ethernet LAN 2 x 9 pin serial ports Compatible with DOS, Windows 95/98, NT, Windows 2000, XP, No operating system. If you want us to install one for you, let us know and we can quote you. Notes: The picture is for representation only. We may use a different case and/or motherboard based upon availability but functionally you will get a socket 478 Pentium 4 computer system as described with 3 ISA slots. If your requirements are different, contact us and we can configure a different system for you. The cases we use are deep enough to accommodate a full length (13.25") ISA card. However; if you are using a half length card, let us know when ordering so we can use a smaller case. Saves you space.