We design and manufacture semiconductor products for Data Center, Telecommunications ("Telecom") and Industrial and Defense ("I&D") applications. Headquartered in Lowell, Massachusetts, we have more than 65 years of application expertise, with silicon, gallium arsenide ("GaAs") and indium phosphide ("InP") fabrication, manufacturing, assembly and test, and operational facilities throughout North America, Europe and Asia. We design, develop and manufacture differentiated, high-value semiconductor products for customers who demand high performance, quality and reliability. We offer a broad portfolio of thousands of standard and custom devices, which include integrated circuits ("IC"), multi-chip modules ("MCM"), diodes, amplifiers, switches and switch limiters, passive and active components and complete subsystems, across dozens of product lines serving over 8,000 end customers in three primary markets. Our semiconductor products are electronic components that our customers incorporate into their larger electronic systems, such as wireless basestations, high speed optical networks, active antenna arrays, radar, medical systems and test and measurement. Our primary markets are: (1) Telecom, which includes carrier infrastructure like long-haul/metro, 5G and fiber-to-the-X ("FTTx")/ passive optical network ("PON"); (2) Data Centers, enabled by our broad portfolio of analog ICs and photonic components for high speed optical module customers; and (3) I&D, which includes military and commercial radar, radio frequency ("RF") jammers, electronic countermeasures, communication data links, satellite communications and multi-market applications, which include industrial, medical, test and measurement as well as scientific applications.
Many of our products have long life cycles ranging from five to ten years, and some of our products have been generating revenue for over twenty years. We continue to develop new products and technologies to improve our ability to serve our primary markets. Our growth strategy is focused on strengthening our customer relationships and capturing more design wins in order to increase our market share. As we grow our portfolio and technology base, we believe our customers will select more of our components for use in their systems.
Our manufacturing model consists of domestic semiconductor wafer fabrication capabilities coupled with our external foundry partners. This provides us with a competitive advantage and an attractive financial model by allowing us to utilize our variable cost structure while enabling us to adapt to changing market conditions and customer demands. We operate semiconductor fabrication facilities at our Lowell, Massachusetts headquarters and in Ann Arbor, Michigan. Our facilities are certified to the International Organization for Standardization ("ISO") 9001 international quality standard and ISO14001 environmental management standard. We manufacture compound semiconductors including GaAs and InP. In the I&D markets, a domestic fabrication facility may be a requirement to be a strategic supplier, and we believe our status as a "Trusted Foundry" offers us further competitive differentiation.