Electronic cash register

Claim 1

In an electronic cash register, the improvement comprising the combination of: a keyboard for having entry keys for inputting sales data and particular data date; a central processing unit coupled to said keyboard for processing input sales data; current date memory means coupled to said central processing unit for storing current dates; particular date memory means coupled to said central processing unit for storing a plurality of particular dates written in by way of operation of said keyboard; message storing means for storing messages corresponding to said particular dates; said central processing unit including: a first register means for receiving current date data from said current date memory means and a second register means for receiving a particular date data from said particular date memory means; means for reading out said current date from said first register means in response to an operation of said keyboard to produce a sales receipt; means for reading out a particular date sequentially from said second register means; comparing means for sequentially determining whether the particular date read from said second register means is a particular date following the current date read out from said first register means everytime a particular date is read from said second register means; and means for extracting only those particular dates following the current date which is read out from said first register means; and printing means coupled to said central processing unit for issuing a sales receipt and for printing on the sales receipt the current date read out of said first register means, calculated sales data, at least one of the particular dates following said current date and at least one message, previously stored in said message storing means, corresponding to said at least one of said particular dates printed on the sales receipt.