In the 1980s, Flight Standards entered into the information age and also sought to bring more standardization to surveillance work programs. Before this, surveillance records were stored on paper at local offices. Work programs were largely defined locally. A series of efforts to provide computerized planning and record-keeping facilities resulted in the Program Tracking and Reporting Subsystem (PTRS). Standardized minimum surveillance planning requirements covering critical areas of certificate holders' operations were embodied in the National work Program Guidelines (NPG). Together, these tools provided a minimum baseline of surveillance activities and a means of planning, tracking and managing these surveillance activities and recording inspectors' observations in a common database.