The term INFORMATION STORAGE UNIT can be broken down into two crossword solutions: BYTE (4 letters) and FICHE (5 letters). A byte is a unit of digital information that typically consists of eight bits, and is used to represent a character, such as a letter, number, or symbol, in a computer system. A fiche is a microform used to store large amounts of data on a small piece of film. It is commonly used in libraries and archives to store documents, photographs, and other records.