Dell OptiPlex 755 DT Celeron 2,0 GHz 500 GB 4 GB Ram RS-232 WINDOWS XP 32 BIT SP3
It has a small form factor (SFF) and is suitable for casual computing needs and workstation. The desktop features VGA connectivity, as well as USB 1.0/1.1 and USB 2.0 ports. It also has an optical drive, RS-232 port AND I-EEE (Parallel) Port.