Sales system utilizing electronic communication system

摘要

A sales system is disclosed capable of effective afterward use of service data once obtained with a customer in a shop. Service members in the shop have their own portable data terminal units 3a to 3c for inputting data corresponding to contents of business talks with customers to form service data satisfying predetermined items. The service data is radio transmitted and stored in a shop computer 1. An initial business talk with a customer visiting the shop may not produce sales, but the service data obtained at that time are stored in a shop computer. The stored service data is made use of for transmitting purchase promotion data to the customer to thereby produce a change of a transaction with the customer.