I would like to dispel the idea that professional writers don't write
books with errors. This is absolute hogwash! The term Errata is not
one of my own making. It is a term used by writers and publishers to
identify errors in books. You usually won't see one for a work of
fiction or poetry. They exist mostly to clarify things of a technical
nature...

Perform a simple Google search on the term "Errata" and you will find
9,250,000 web pages using the term... Have fun if you can read all of
them... Many like myself will thank their readers for helping them
find this Errata. This is customary.

1) ERRATA for Introduction to the Theory of Computation,
second printing. This is a text book used at MIT. It's in it's second
printing and you will find that both the first and second printing
have pages of Errata.

http://www-math.mit.edu/~sipser/itoc-errs1.2.html

2) Speech and Language Processing. Again another textbook in it's
second publishing. It seems that even people who deal in language
can't help in creating Errata...

http://www.cs.colorado.edu/~martin/SLP/slp-errata.html

3) Here's a fun one yet only two errors in the Painless Grammar book...

http://www.nakedize.com/ccc-errata.cfm

I could go on but... I think my point is made. Errata happens. It's
a natural part of writing.

Bob Dietz ?;O)