IBM think center desktop model M50-8189 unu. 4 GB's of ddr pc3200 memory. DVD/RW drive. 2.5 floppy Dr. Intel pro V10/100/1000 fast Ethernet .8 USB 2.0 slots, 1 ps-2 keyboard and 1 ps-2 mouse port. SATA II 500 GB HDD, WIndows7 home premium /media center. Intel Pentium 4 HT processor. comes with mouse, Lenovo internet media keyboard, powercord. A real IBM. Great buy for the money for a dependable machine for home or school dorm use. Take it away!