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AfterMaster, Inc., together with its subsidiaries, operates as an audio technology company in the United States. It develops and commercializes proprietary audio and video technologies for professional and consumer use. The company offers AfterMaster audio, a mastering, remastering, and audio processing technology that makes various audio source sounds louder, fuller, deeper, and clearer; ProMaster, an online music mastering, streaming, and storage service designed for independent artists; and Aftermaster Pro, a personal audio re-mastering device. It also provides Aftermaster Studio Pro products for use in commercial audio applications; and MyStudio products. In addition, AfterMaster, Inc. operates six recording and mastering studios. The company was formerly known as Studio One Media, Inc. and changed its name to AfterMaster, Inc. in September 2015. AfterMaster, Inc. was incorporated in 1988 and is based in Scottsdale, Arizona.

Andrea Electronics Corporation, together with its subsidiaries, designs, develops, and manufactures digital microphone products and noise reduction software that facilitate natural language and human/machine interfaces for the computer and business enterprise markets in the United States and internationally. The company develops digital signal processing (DSP) products and technologies for the voice, speech, and natural language interface markets. Its DSP microphone and audio noise reduction software products include DA-350 auto array microphone for far-field voice intelligibility and accuracy of automatic speech recognition in automotive and mass transit environments; DA-250 OEM array microphone, a small compact stereo array microphone and DSP circuit board platform; USB-SA array microphone, which offers a USB digital audio adapter to bypass a computer's standard integrated sound system; AudioCommander, a PC audio control panel; an audio software for Mac that offers an intuitive graphic user interface to control stereo array microphone beam forming and noise cancellation on the input and EQ filters; PureAudio Live Recorder, a digital voice and audio recording application; and PureAudio Plus Recorder, which provides bookmarks for navigation of recordings. Its products are used in various applications, including mass transit and automotive communication systems, automated teller machines, information kiosks, quick service restaurant automated ordering, Internet of Things, smart building entrance intercom systems, audio and video recordings, and video surveillance. The company markets and sells its products through sales representatives to computer and kiosk OEMs and industrial system integrators. Andrea Electronics Corporation was incorporated in 1934 and is headquartered in Bohemia, New York.

ParkerVision, Inc. designs and develops radio frequency technologies and integrated circuits for use in wireless communication products. The company was incorporated in 1989 and is based in Jacksonville, Florida.

Technical Communications Corporation engages in the design, development, manufacture, distribution, marketing, and sale of communications security devices, systems, and services worldwide. The company primarily provides data, video, fax, and voice networks. Its products include government systems, such as CSD 3324 SE secure telephone, fax and data system; CSD 3324 SP telephone and fax system; DSD 72A-SP military bulk ciphering system; and DSP 9000 radio encryption system, as well as the HSE 6000 squad radio headset and telephone encryptor for public safety special operations, land mobile radio applications, and for military applications. The company also provides network security systems comprising network encryption systems with centralized key and device management for IP, SONET/SDH, and frame relay networks to secure data in transit from local area network to local area network and across wide area networks. In addition, it offers secure office systems, such as CSD 4100 executive secure telephone and CipherTalk 8500 Internet protocol (IP)-based secure wireless phone. The company's products are used to protect confidentiality in communications between radios, landline telephones, mobile phones, facsimile machines, data network equipment over wires, fiber optic cables, radio waves, and microwave and satellite links. Further, it offers funded research and development, and technology development services. The company serves various markets, including foreign and domestic governmental agencies, law enforcement and military agencies, telecommunications carriers, financial institutions, and multinational companies requiring protection of mission-critical information. It sells directly to customers, original equipment manufacturers, and value-added resellers using its in-house sales force, as well as domestic and international representatives, consultants, and distributors. Technical Communications Corporation was founded in 1961 and is based in Concord, Massachusetts.