The term PARTS OF MORSE CODE can be broken down into four letters, DAHS. DAHS are the longer pulses of sound or light used in Morse Code. They are used to represent the letter 'D' in Morse Code and are typically three times as long as the shorter pulses, known as dots. Together, dahs and dots form the basis of Morse Code, which is a system of communication using dots and dashes to represent letters, numbers, and punctuation.