In 1989, EMC began offering data acquisition software for Ambient Air Quality Monitoring, Continuous Emission Monitoring ( CEM ) and Meteorological Monitoring. EMC Station Manager data loggers EMC System Manager central data management systems supply real-time data, charts, reports, alarms, and calibration control to thousands of government and commercial clients worldwide. EMC also offers a full line of related data acquisition software. Our Air Quality Map software publishes unique graphical maps of air monitoring data to a customer website automatically every hour. Our Air Quality Voice software is an interactive voice response system for providing Air Quality Index ( AQI ) and pollutant concentration data to the public via telephone.