HP Instrument controller modules all are module MDL: A2250B RAM: 16 MB Resolution: 1024x768 Monitor size: 17" CRT LAN: YES SCSI: YES HD: 2 GB SOFTWARE: HP-UX 9.10 Drive: CD Mouse: YES SN#: 3533A9002B, Select:27:(IB) 3533A90021, Select :27 (IB) No S/N Select 22: (Coax Interface) 3533A90027, Select 12: (GPIO (98622A), also has centercom twisted pair transreciever 3533A90023, Select 27: (IB)