Typographical error

Most typos involve simple duplication, omission, transposition, or substitution of a small number of characters.

When a finger is bigger than the touch zone, with touchscreens or keyboards, there can be inaccuracy and one may hit two keys in a single keystroke.

This saved the typist the trouble of retyping the entire page to eliminate the error, but as evidence of the typo remained, it was not aesthetically pleasing.

In computer forums, sometimes "^H" (a visual representation of the ASCII backspace character) was used to "erase" intentional typos: "Be nice to this fool^H^H^H^Hgentleman, he's visiting from corporate HQ.

Some classifications include homeoteleuton and homeoarchy (skipping a line due to the similarity of the ending or beginning), haplography (copying once what appeared twice), dittography (copying twice what appeared once), contamination (introduction of extraneous elements), metathesis (reversing the order of some elements), unwitting mistranscription of similar elements, mistaking similar looking letters, the substitution of homophones, fission and fusion (joining or separating words).

The Judas Bible is a copy of the second folio edition of the authorized version, printed by Robert Barker, printer to James VI and I, in 1613, and given to the church for the use of the Mayor of Totnes.

Typos are common on social media, and some—such as "teh", "pwned", and "zomg"—have become in-jokes among Internet groups and subcultures.

P0rn is not a typo but an example of obfuscation, where people make a word harder for filtering software to understand while retaining its meaning to human readers.

The resulting effect is that there are far fewer bids than there would be under normal circumstances, allowing the searcher to obtain the item for less.