Rex Black, President of RBCS, has a quarter-century of software and systems engineering experience. RBCS is a leader in software, hardware, and systems testing, with clients ranging from startups to Fortune 20 companies. Rex is the most prolific author in the field of software testing, with books that have sold tens of thousands of copies. He has presented hundreds of papers, workshops, and seminars, and given some 30 keynote speeches at conferences and events worldwide.