GRiD Defence Systems has been manufacturing rugged portable computers for Military use since GRiD invented the first clamshell laptop in 1981. GRiD manufactures a range of products based around Intel Pentium and Sun UltraSPARC processors. The range includes Rugged Laptop's, Rugged Expandable Workstations, 19" Rack Mounted Processors and Rugged Mobile Processor Units. All GRiD products are designed to offer a high degree of flexibility in their configuration that allows them to be tailored to meet customer specific requirements. The entire range of GRiD products are designed in such a way that by simple upgrade they can be made to conform to Military standards such as MIL-STD-461 (Def Stan 59-41) for EMC, MIL-STD-810 (Def Stan 00-35) for harsh environments, and TEMPEST for security. GRiD products are in use with Army, Navy and Air Forces around the world, often used in the most hostile battlefield environments. All GRiD products are designed and manufactured in the UK and are supported for up to 15 years from the final build date. GRiD's expertise covers all aspects of mobile military computing.