Monitoring of security systems, burglar alarm systems, fire detection systems, critical process systems, sprinkler maintenance systems, access control systems, closed circuit television systems, electrical and electronic burglar alarms, leak detecting devices, water sensors, medical alarms, audible alarms, personal security alarms, smoke alarms and theft alarms; police protection services, security guard services, and private investigative services in the fields of commercial, industrial and government facilities, sports complexes, power plants, and crowd control, and providing temporary security guard personnel for assistance at special events