Fire alarm systems and accessories; firefighter's emergency phone systems; emergency communications systems and accessories; smoke, flame and heat detector and sensor systems and accessories; sprinkler systems; time and attendance systems; automated payroll systems; payroll processors, attendance readers, coders and recorders; sound and communication systems; intercom and annunciation systems; nurse call systems; access control systems and peripherals; security and facilities management systems; closed circuit television systems; multiplexing systems; instrusion detection systems; detention control systems; identification systems; master time control systems; integrated and automated time and attendance systems; data collection terminals