Peter Prinz is a seminar leader and key course developer, teaching courses to thousands of software developers for Unix and Windows systems. As the chief developer and cofounder of the IT company Authensis AG in Germany, he has gained extensive experience in software development for computer telephony. Peter is also the author of several other books on software development in C/C++, most of them as coauthor with Ulla Kirch-Prinz, including O'Reilly's C Pocket Reference.

Tony Crawford is a technical writer and freelance translator with a strong C background. In addition to regular software localization projects, he has translated books on network administration and ATM. A U.S. native, Tony translates documents from German into English and is based just outside Berlin.