Intercoms; paging equipment; cameras; warning bells and notifications in the nature of electronic warning bells for educational institutions; downloadable computer software for visual messaging; microphones; audio speakers; receivers for receiving audio signals; radio transmitters; computer monitors; batteries; network servers; 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; audible and visible notification appliances, namely, sirens, electronic warning bells, electronic warning horns, and audio speakers; sound transmitting apparatus; sound alarms; sound projectors and amplifiers; assistive listening device not for medical purposes; computer hardware and peripheral devices and downloadable computer software for logging, monitoring and alerting in the event of bullying, fighting, weapons, or medical emergencies; building security systems comprising downloadable software and hardware for providing logging, monitoring, picture, video, alarm status and other information to a remote station; downloadable communications software for connecting users of the alerting software using both cloud and on premise networks; two-way intercoms; electronic bells and notification system comprised of electronic warning bells, 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; communications servers

Flashing strobe light apparatus