1) Giant magneto-resistive 
[cryptography] In cryptography, GMR is a digital signature algorithm named after its inventors Shafi Goldwasser, Silvio Micali and Ron Rivest. As with RSA the security of the system is related to the difficulty of factoring very large numbers. But, in contrast to RSA, GMR is secure against adaptive chosen-message attacks — even when an at...[magazine] GMR was a monthly magazine on video games that was published by Ziff-Davis — the publisher of such magazines as PC Magazine, Electronic Gaming Monthly, and Computer Gaming World (later Games for Windows: The Official Magazine). GMR was launched in February 2003, being sold in only the Electronics Boutique (EB) chain of video ga...
'Get more rats!' A highly infectious condition which, once taken hold, can be nigh on impossible to treat successfully without a course of eepers.
Giant Magneto-Resistive (read head technology)
Ground Mapping Radar