Sorting and Searching - errata and addenda.

This report lists all the typographical errors, in $underline{The Art of Computer Programming / Volume 3}$, that are presently known to its author. Several recent developments and references to the literature, which will be incorporated in the second printing, are also included in an attempt to keep the book up-to-date. Several dozen corrections to the second (1971) printing of volume two are also included.