A small cock fitted to a pressure or other measurement gage to allow for isolation of the gage for purposes of maintenance
Glossary - G
This is a glossary of older terms. While many of the definitions are unchanged, some of the definitions may be out of date and some of the terms may no longer be in use in the Data Center industry. This legacy glossary provides definitions for hundreds of information and communications technology (ICT) and data center terms and acronyms. Arranged alphabetically and searchable, the glossary explains common industry vocabulary.
Gage-cock
Gas
A substance which (i) at 50 degrees Celsius has a vapour press of greater than 300 kPa (absolute); or (ii) is completely gaseous at 20 degrees Celsius at a standard pressure of 101.3 kPa. Source: United Nations GHS
Gateway
A hardware or software setup that translates between two dissimilar protocols, or commonly, any mechanism for providing access to another system
GEC
Global Electronics Council, a not-for-profit industry organization. Source: GEC
Gelled Electrolyte
See electrolyte, gelled
Generator
A dynamo or similar machine for converting mechanical energy into electricity. Source: Oxford Languages
Geometric Mean
A mean (average value) that is obtained through the use of multiplication and Nth roots rather than by addition and division. To calculate, take the Nth root (the power of 1/N) of the product of all N terms. The geometric mean has the interesting property that a certain percentage change in any one of the terms has the same effect as the same percentage change in any of the other terms and even successive changes in the same term will have the same effect as if the changes were instead spread over other terms. What this means in benchmarking terms is that a 10% improvement in one benchmark has the same effect on the overall mean as a 10% improvement on any of the other benchmarks and that another 10% improvement on that benchmark will have the same effect as the last 10% improvement. Thus no one benchmark in a suite becomes more important than any of the others in the suite
GHGs
Greenhouse gases. Source: GEC
GHS
Globally Harmonized Systems of Classification and Labelling of Chemicals. Source: United Nations GHS
Global Positioning System (GPS)
A system of satellites and receiving devices used to compute positions on earth
Global Warming Potential (GWP)
Global warming potential. Source: IPCC
Globally Harmonized Systems of Classification and Labelling of Chemicals
Globally Harmonized Systems of Classification and Labelling of Chemicals (GHS). Source: United Nations GHS
Governance
A comprehensive and inclusive concept of the full range of means for deciding, managing, implementing, and monitoring policies and measures. Whereas government is defined strictly in terms of the nation-state, the more inclusive concept of governance recognizes the contributions of various levels of government (global, international, regional, sub-national and local) and the contributing roles of the private sector, of nongovernmental actors, and of civil society to addressing the many types of issues facing the global community. Source: IPCC
gpm or g/m
Gallons per minute. Source: ASHRAE
GPU
Graphic processing unit. Source: ASHRAE
Graphic Processing Unit (GPU)
A component type of data center class server. Source: NVIDIA
Grid
The layout of an electrical distribution system. Source: United States Energy Information Administration
GWh
A unit of energy representing one billion 1,000,000,000-watt hours. Source: Eurostat