Entropy 3 topics · 3 sources ScienceEnergyA measure of the unavailable or unusable energy in a system; energy that cannot be converted to another form.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite ScienceWeatherThe amount of energy that is not available for work during a certain process.NOAA National Weather Service — National Weather Service Glossary Cite TechnologySecurityA measure of the amount of uncertainty that an attacker faces to determine the value of a secret.NIST — Glossary of Key Information Security Terms Cite