soft armor

A countermeasure is a measure or action taken to counter or offset another one. As a general concept it implies precision, and is any technological or tactical solution or system (often for a military application) designed to prevent an undesirable outcome in the process. The first known use of the term is in 1923.
Countermeasures can refer to the following disciplinary spectrum:
Materials engineering
Electro-magnetic engineering
Information technology
Diplomatic security
Pollution prevention
Defense countermeasures are often subdivided into "active" and "passive" countermeasures.

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