Abstract: The invention is a wearable computer system comprised of a transferable core computer module and an enclosure which has been constructed to be instrinsically safe according to Class 1, Divisions 1, 2 or both of the U.S. Electrical Code. According to the system of the present invention, workers may make use of this system in environments in which typical electrical devices may not be used due to the presence of ambient ignitable gases and vapors. The enclosure may also be designed to have the properties of water tightness, air tightness and shock absorbtion.