The term 'smallest bit' can be represented by three different crossword solutions: IOTA (4 letters), JOT (3 letters), and WHIT (4 letters). IOTA is a Greek letter that is used in mathematics and science to represent a very small quantity. JOT is an informal term meaning a very small amount or a tiny detail. WHIT is an old English word meaning the smallest possible amount. All three of these words can be used to describe the concept of the smallest bit.