Datenverarbeitungsapparat.

摘要

A data processing apparatus for use in an electronic data research system in which data produced at respective panelist home is transmitted to a data center via a telephone link which is commonly used by a telephone set of the panelist home, there are provided a center call mode in which the data is transmitted to the data center in response to the polling from the data center within a predetermined time gate, a terminal call mode in which the data is transmitted to the data center at a predetermined time out of the time gate, and a real time mode in which current data is transmitted to the data center while the connection between the panelist home and data center via the telephone link is continuously made.