ISO 5776, published by the International Organization for Standardization (ISO), is an international standard that specifies symbols for proofreading such as of manuscripts, typescripts and printer's proofs. The total number of symbols specified is 16, each in English, French and Russian.
A first edition of the standard was published in 1983.
A second edition of the standard was published in 2016 which cancels and replaces the first edition from 1983.
The third revised edition was published in 2022 and replaced the second edition from 2016.