Dell OptiPlex 3020 MT Business/Professional PC - Intel Core i3-4160 3.60 GHz Processor - 4GB RAM - 500GB Hard Drive - DVDRW - Windows 7 Professional (Mini-tower) Intel&reg; Core&trade; i3-4160 Processor (Dual Core, 3MB, 3.60GHz w/HD4400 Graphics) /&nbsp;Windows 7 Professional 64bit operating system installed ( Windows 8.1 Professional license and media) 4GB DDR3 RAM (Expandable to 16GB) / Integrated Intel&reg; HD Graphics 4400 500GB 7200RPM Hard Drive /&nbsp;16X DVD+/-RW&nbsp;/ No monitor included. US English (QWERTY) Dell KB212-B QuietKey USB Keyboard Black / Dell USB Optical Mouse MS111 Ports: 2 external USB 3.0 ports (rear) and 6 external USB 2.0 ports (2 front, 4 rear); 1 Serial port (optional); 1 PS/2 (optional); 1 RJ-45; 1 VGA; 1 DisplayPort 1.2; 1 Mic-in & 1 Headphone out (front); 1 Mic-in/Line-in & 1 Line-out(rear).