A bit of code is a sequence of instructions that can be used to perform a specific task. The term 'bit of code' is often used in computer programming and software engineering. In the context of a crossword puzzle, the solutions DIT (3 letters) and DAH (3 letters) refer to Morse code, which is a type of bit of code used to communicate information through a series of dots and dashes. DIT stands for dot and DAH stands for dash.