Availability (Operational) : A measure of the degree to which a system is either operating or is capable of operating at any time when used in its typical operational and support environment
US Army Center for Health Promotion and Preventive Medicine CHPPM, TG 204 Glossary of Terms For Nuclear, Biological, and Chemical Agents And Defense Equipment (Section 2 - General Terms), MD, USA 2001. http://www.au.af.mil/au/awc/awcgate/army/tg204.pdf , (CBRNE Agt and Def Equip/ Gen Terms - Amer) {487}
Madison County North Carolina Government, Madison County Emergency Operations Plan Glossary (Section 2: General Terms), NC, USA 2009. http://www.madisoncountync.org/eop/Madison_EOP_PDF /Glossary.pdf, (CBRNEmr - Amer) {874}