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What does ISL stand for?

ISL stands for Industrial Security Letter

This definition appears somewhat frequently and is found in the following Acronym Finder categories:

  • Military and Government

See other definitions of ISL

Other Resources:
We have 212 other meanings of ISL in our Acronym Attic

Samples in periodicals archive:

A recent Industrial Security Letter (ISL) announced an Industrial Security Manual (ISM) change designed to correct one of the most pervasive risks to classified material during nonworking hours.
After the testing is complete, an Industrial Security Letter article will be published that will explain the administrative details and the schedule to begin processing requests.