Anyone can claim to be an expert, but most can’t stand on four decades of experience providing products and solutions to the security industry. APD has served this industry since 1972, and we have grown and adapted as the technology has evolved. When you need an expert to count on, one with real industry experience you can rely on, APD is in your corner ready to provide the products and knowledge you need to succeed! Securing Integrity. Protecting the Professional. The integrity of the security industry as a whole has been compromised! Many security companies today are experiencing increased pressure from online retailers and national distributors who are selling to unlicensed contractors and online resellers. At APD, we do NOT sell to unlicensed contractors, or online resellers. APD only works directly with professional security companies just like you, who are committed to our industry.