For Further Reading
The BSD component of the Mac OS X kernel is complex. A complete description is beyond the scope of this document. However, many excellent references exist for this component. If you are interested in BSD, be sure to refer to the bibliography for further information.
Although the BSD layer of Mac OS X is derived from 4.4BSD, keep in mind that it is not identical to 4.4BSD. Some functionality of 4.4 BSD has not been included in Mac OS X. Some new functionality has been added. The cited reference materials are recommended for additional reading. However, they should not be presumed as forming a definitive description of Mac OS X.
