Abstract: A computer system includes hardware for interfacing with the public telephone network and for accepting incoming telephone calls. The computer system detects from the incoming telephone calls automatic number identification data (ANI data), such as Caller-ID data, which identifies the calling telephone and further accepts personal identification codes from the caller. The system generates reports of the incoming telephone calls in which reports the location of the calling telephone is correlated with the person who is making the telephone call. Preferably, the system is applied for recording remotely, through the telephone network, the arrival and departure times of field based employees at various work sites.