HP Pavilion a1020n Desktop PC (Intel Pentium 4 Processor 519J, 512 MB RAM, 200 GB Hard Drive, DVD/CD-RW Drive) (Discontinued by Manufacturer) 3.06 GHz Pentium 4 processor with 533 MHz front-side bus, 1 MB L2 cache 200 GB hard drive, 512 MB RAM (4 GB maximum), dual layer DVD-/+RW, CD-ROM drives 7 USB 2.0, 2 Firewire (IEEE1394), 1 serial, 1 parallel, 1 VGA, headphone, microphone, multiformat memory card reader Built-in 10/100 Ethernet and 56K modem Windows XP Home Edition