“"He" should be read as "he or she" throughout the book.”
Andrew S. Tanenbaum book Modern Operating Systems
Modern Operating Systems, 3rd ed., p. 2.

Modern Operating Systems is a book written by Andrew Tanenbaum, a version of his book Operating Systems: Design and Implementation. It is now in its 4th edition, published March 2014 .
“"He" should be read as "he or she" throughout the book.”
Andrew S. Tanenbaum book Modern Operating Systems
Modern Operating Systems, 3rd ed., p. 2.
Andrew S. Tanenbaum book Modern Operating Systems
Modern Operating Systems (with co-author Herbert Bos), 4th ed, p. 596