Security 50 examines the global security industry by finding the most thriving companies and how their businesses performed. While the economic recession took its toll for 2008, this year's participants distinguished themselves with strategies for survival. We look at the industry trends behind the figures.

Security 50 represents security industry leaders from different product categories: Video Surveillance, Access Control, Biometrics, Intrusion Detection and Multiple. It ranks product sales of manufacturers, excluding installation, integration, distribution and resale income.