A data exchange system among in which data is mutually exchanged among
cooperative companies which produce products cooperatively, provides for
periodically collecting or retrieving at least one of product progress
information, quality information, and business information of one's own
company, standardizing and editing data for transmission to the
cooperative companies, exchanging data between one's own company and the
other companies, outputting transmission data to a file in a fixed format
as attached data of an e-mail, automatically and periodically
transmitting the e-mail to the cooperative companies, and receiving
e-mail corresponding to the transmission data from the cooperative
companies.
