A MIL certified system is any computer, display, workstation or I/O device that meets a set of specific U.S. government and military standards. 
The systems meet the performance requirements for MIL 901-D Shock, MIL-167 Vibration, MIL 461 D EMI/EMC and MIL 810 F Operating Temperature, Storage Temperature and Humidity.

To facilitate an overall MIL approved installation, Comark provides computers, displays, workstations and I/O
devices that meet the requirements as defined by the military.

Some of these include:
Operating temp 0°- 50° C
Storage Temp -20° to 85°C
Humidity 5 to 95%
Shock Grade A, Class 1, Type 1
Vibration
EMI/EMC