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Aehr Test Systems provides test solutions for testing, burning-in, and semiconductor devices in wafer level, singulated die, and package part form, and installed systems worldwide. Its product portfolio includes FOX-XP and FOX-NP systems that are full wafer contact and singulated die/module test and burn-in systems that can test, burn-in, and stabilize range of devices, including silicon carbide-based and other power semiconductors, 2D and 3D sensors used in mobile phones, tablets and other computing devices, memory semiconductors, processors, microcontrollers, systems-on-a-chip, and photonics and integrated optical devices. The company also offers FOX-CP system, a low-cost single-wafer compact test solution for logic, memory, and photonic devices; FOX WaferPak Contactor, a full wafer contactor capable of testing wafers up to 300mm that enables integrated circuit manufacturers to perform test, burn-in, and stabilization of full wafers on the FOX-P systems. In addition, it provides FOX DiePak Carrier, a reusable temporary package that enables IC manufacturers to perform final test and burn-in of bare die and modules; and FOX DiePak Loader. The company was incorporated in 1977 and is headquartered in Fremont, California.

Allied Motion Technologies Inc., together with its subsidiaries, designs, manufactures, and sells precision and specialty controlled motion components and systems for various industries worldwide. The company offers brush and brushless DC motors, brushless servo and torque motors, coreless DC motors, integrated brushless motor-drives, gearmotors, gearing, modular digital servo drives, motion controllers, optical encoders, active and passive filters, input/output modules, industrial communications gateways, light-weighting technologies, and other controlled motion-related products. The company sells its products to end customers and original equipment manufacturers in vehicle, medical, aerospace and defense, and industrial markets through direct sales force, authorized manufacturers' representatives, and distributors. Allied Motion Technologies Inc. was incorporated in 1962 and is headquartered in Amherst, New York.

Frequency Electronics, Inc., together with its subsidiaries, engages in designing, development, and manufacturing of precision time and frequency control products and components for microwave integrated circuit applications. It operates through two segments, FEI-NY and FEI-Zyfer. The FEI-NY segment offers precision time and frequency control products for communication satellites, terrestrial cellular telephone or other ground-based telecommunication stations; and other components and systems for the U.S. military; and provides design and technical support for satellite business. FEI-Zyfer segment offers global positioning system technologies to systems and subsystems for secure communications, both government and commercial, and other locator applications; and engages in sale and support of wireline telecommunications products, including US5G. It markets its products directly and through independent sales representative organizations located in the United States, Europe, and Asia. Frequency Electronics, Inc. was founded in 1961 and is headquartered in Mitchel Field, New York.

Transcat, Inc. provides calibration and laboratory instrument services in the United States, Canada, and internationally. It operates through two segments: Service and Distribution. The Service segment offers calibration, repair, inspection, analytical qualification, preventative maintenance, consulting, and other related services. This segment also provides CalTrak, a proprietary document and asset management system that is used to manage the workflow of its calibration service centers and customers' assets; and Compliance, Control and Cost, an online customer portal that provides its customers with web-based asset management capability, as well as a safe and secure off-site archive of calibration and other service records. The Distribution segment sells and rents test, measurement, and control instruments for customers' test and measurement instrumentation needs, as well as value added services, such as calibration/certification of equipment purchase, equipment rental, used equipment for sale, and equipment kitting. This segment markets and sells its products through website, digital and print advertising, proactive outbound sales, and an inbound call center. The company provides services and products to highly regulated industries, principally life science, which includes companies in the pharmaceutical, biotechnology, medical device, and other FDA-regulated industries; and additional industries, including aerospace and defense industrial manufacturing, energy and utilities, and other industries that require accuracy in processes and confirmation of the capabilities of their equipment. Transcat, Inc. was incorporated in 1964 and is headquartered in Rochester, New York.