Abstract: This system is a dual computer system with two or more separate network domains built in a custom secure computer case with lockable front and back covers, incorporating two totally separate (CPU), motherboards, (RAM), hard drives, floppy drives, (CD-ROM) drives, a secure removable hard drive, an electromechanical key-lock/switch for power-on and access control, two separate color coded reset buttons, a Smart Card® reader/writer which will verify the user identity through an entered (PIN) for accessing the classified network domain and an external electronic switch for switching video, keyboard, mouse signals for each network domain. Upon powering up the computer with the secured access control key the computer will power-up both secure domains however, only the first secure domain will be accessible. The classified domain can be accessed within one second where a (PIN) will be required through the Smart Card® reader/writer for user access control which guarantees user access control.

Abstract: A computer system and method for storing distinct data types is disclosed. The computer system includes a plurality of data storage devices wherein data of a first type may be stored on a first one of the data storage devices and data of a second type may be stored on at least another one of the data storage devices, wherein at least one of the data types requires controlling access thereto. The invention provides for ensuring the integrity of the data stored on the data storage devices. It also prevents misappropriation of data stored on the devices. The invention includes a switch which selects one of the data storage devices for use with a computer system. Selecting a data storage device activates and places it in an operational mode. The remaining data storage devices are placed into a non-operational mode.