B K Engineering, 826 Suffolk Ave, Brentwood, NY 11717, US

APS Security, established in 1976, installs combinations of security systems for homes, offices, stores and factories. It uses professionally trained alarm and locksmith technicians to install, maintain and service the systems. It works with architects and interior designers so that the installations fit in with the background. Its products include burglar and fire alarm systems custom tailored to individual needs and card access systems ranging from single-door access to multilevel systems. The company also offers closed circuit TV systems, intercom systems for apartment houses, business and private residences and a full line of safes. It also provides armed guards for businesses and private customers. APS Security has its headquarters in Merrick, N.Y.