Addendum

In the plural, both the Latin addenda and the English adaptation addendums are acceptable.

Books

In a book, an addendum (sometimes referred to as an "appendix") is a supplemental addition to a given main work. It may correct errors, explain inconsistencies or otherwise detail or update the information found in the main work, especially if any such problems were detected too late to correct the main work. For example, the main work could have had already been printed and the cost of destroying the batch and reprinting is deemed too high. As such, addenda may come in many forms — a separate letter included with the work, text files on a digital medium, or any similar carrier.

Contracts

In other documents, most importantly in contracts, an addendum is an additional text not included in the main text which may contain additional specifications, provisions, standard forms or other information, especially pricing information. A contract addendum may also be called an appendix or a rider.

Schedules and exhibits are sub-categories of addenda, with schedules being related to numerical and time information such as pricing and time-schedules, and exhibits used for examples of standard forms and different types of evidence or models. '''''''

See also

• Postscript