identifying signal; recognition signal; (radio) call sign
identifier; distinguished name; DN
Identification, Friend or Foe; IFF
air defense identification zone; ADIZ
unidentifiable; indiscernible; unrecognizable; indistinguishable
ability to discriminate or discern; (powers of) discrimination or discernment
personally identifiable information; information for personal identification; PII
function character identification parameter
presentation context identification
soft-decision discriminator