On page 121, the line that says

printf "%s", text). If the

should read

printf("%s", text). If the

Thanks to Carolyn Meinel for discovering this error.

On page 210, five lines from the top of the page, "HIPPA" should read "HIPAA" (Health Insurance Portability and Accountability Act).

Thanks to Ming Chow from Tufts University for catching this error.