It is intended for hardware system manufacturers and software developers of applications, operating systems, or tools. It contains Specification Changes, S-Specs, Errata, Specification Clarifications, and Documentation Changes. Specification Changes are modifications to the current published specifications. These changes will be incorporated in the next release of the specifications.
Errata are design defects or errors.
Hardware and software designed to be used with any given stepping must assume that all errata documented for that stepping are present on all devices. Specification Clarifications describe a specification in greater detail or further highlight a specification's impact to a complex design situation. These clarifications will be incorporated in the next release of the specifications. Documentation Changes include typos, errors, or omissions from the current published specifications. These changes will be incorporated in the next release of the specifications.