FIELD: calculating; counting.
SUBSTANCE: invention relates to means of issuing new certificates. Data processing system comprises: issuing certificates of a computer comprising a processing unit for determining an interest rate and a dividend and for converting the first certificate to a second certificate after expiration of a predetermined period from issuing the first certificate and a database which manages certificates, wherein the processing unit comprises a conversion unit configured to execute a process of converting certificates.
EFFECT: technical result is wider range of means of issuing certificates.
30 cl, 38 dwg
