Abstract: A plurality of remote terminals (A) are each disposed in a physician's office and are connected by telephone lines or other electronic data communication with a central processing system (B). Each terminal includes a data entry key board (10) and a magnetic tape reader (12) for entering physician, patient, medical service, insurance, and other medically related data. The entered data is processed by a terminal processor (20) to incorporate previously stored data from an electronic data memory and to transfer and store entered medical transaction data to memory.