General Science

  • adjective using both letters and numbers
  • adjective referring to data that includes letters and numbers


  • Combinations of letters, numbers, and special characters used by computers. It was previously more common to only encompass letters and numbers under this heading. Also called alphabetic-numeric, or alphameric.
  • synonymalphabetic-numeric
  • synonymalphameric

Information & Library Science

  • adjective using a combination of symbols made up of Roman letters and Arabic numerals including punctuation marks