API Technologies Corp. (API) designs, develops and manufactures systems, subsystems, radio frequency (RF) and secure communications products, as well as provides electronics manufacturing and engineering services. Its product lines include engineered products (including unmanned aerial vehicles (UAVs), aiming systems and synthesizers), secure communications products (including TEMPEST and emanation security, encryption and secure networking products), subsystems and components (including custom hybrids, MIL-STD-1553 Data Bus, terminals, transistors and magnetics), RF and microwave products (including custom filters, amplifiers, connectors and antennas), sensors, and power systems. It operates in two segments: Systems & Subsystems, and Secure Systems & Information Assurance. On June 1, 2011, it acquired Spectrum Control, Inc. On November 29, 2011, API acquired Commercial Microwave Technology, Inc. In March 2012, the Company acquired C-MAC Aerospace Limited (C-MAC).