Typographic error：Typographical error

Mistake made in typing printed material

Titivillus is a demon said to introduce errors into the work of scribes. This is a 14th century illustration of Titivillus at a scribes desk.

A typographical error (often shortened to typo), also called a misprint, is a mistake (such as a spelling or transposition error) made in the typing of printed or electronic material.[1] Historically, this referred to mistakes in manual typesetting. Technically, the term includes errors due to mechanical failure or slips of the hand or finger,[2] but excludes errors of ignorance, such as spelling errors, or changing and misuse of words such as "than" and "then". Before the arrival of printing, the copyists mistake or scribal error was the equivalent for manuscripts. Most typos involve simple duplication, omission, transposition, or substitution of a small number of characters.

"Fat finger" typing (especially in the financial sector) is a slang term referring to an unwanted secondary actio...