A code character is a unit of information used in various coding systems. The two most common code characters are DIT (three letters) and DAH (three letters). DIT stands for 'DOTS' and DAH stands for 'DASHES'. These code characters are used in Morse code, which is a system of communication that uses a series of DOTS and DASHES to represent letters, numbers, and symbols. In Morse code, DIT is represented by a single dot and DAH is represented by a single dash. Together, these two code characters form the basis of the Morse code alphabet.