Contains

• Morse

  A telegraph code in which letters and numbers are represented by strings of dots and dashes...

• access

  A code (a series of characters or digits) that must be entered in some way (typed or dialed...

• area code

  A number usually of 3 digits assigned to a telephone area as in the United States and...

• bar code

  Code consisting of a series of vertical bars of variable width that are scanned by a laser;...

• color code

  System using colors to designate classifications.

• cryptograph

  A secret method of writing.

• ZIP code

  A code of letters and digits added to a postal address to aid in the sorting of mail.