The Morse Code was developed by Samuel F.B. Morse in 1844. Even after almost 170 years, it is still used today. The code can be sent quickly over the telegraph, and is also useful for emergency signaling (SOS) with a radio, mirror, or flashlight. This card set details all of the morse codes for the alphabet, numbers and additional punctuation symbols. There are over 50 cards in the set. Presented in a clear plastic hard case.