Alarm installations and alarms; Audio processing equipment, namely, limiters and compressors; Fire alarms; Software to control and improve audio equipment sound quality; Acoustic amplifiers; Communication modems; Computer software for encryption; Computer software for manipulating digital audio information for use in audio media applications; Computer software for use in the encryption and decryption of digital files, including audio, video, text, binary, still images, graphics and multimedia files; Computer software for use in the safeguarding of digital files, including audio, video, text, binary, still images, graphics and multimedia files; Computer software to control and improve computer and audio equipment sound quality; Electronic encryption units; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Emergency notification system comprised of a data processor and a user input device for connecting the data processor to an emergency response entity through a communication network and allowing audio and data communication between the processor and the entity; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Security and fire alarms; Signal processors for audio speakers