What does CLASS, CLASSIF stand for?

Classification

The separation of ores into fractions according to size and specific gravity, generally in accordance with Stokes' law of sedimentation.or Separation of a metal powder into fractions according to particle size.or The determination that official information requires, in the interests of national security, a specific degree of protection against unauthorized disclosure, coupled with a designation signifying that such a determination has been made. also security classification.