Abstract: An input data storing unit stores input data to be entered into a program. A program receiving unit receives a program transmitted from a program storage system. An input data input unit enters the input data into the program. An output data obtaining unit obtains an output from the program when the input data is entered into the program. A program deleting unit deletes the program from the user system in response to when a predetermined use condition of the program is satisfied.

Abstract: A distribution specifying unit (56) specifies a distribution of values of first attributes in a plurality of first type data segments included in a first data set. A distribution specifying unit (56) specifies a distribution of values of second attributes in a plurality of second type data segments included in a second data set. An evaluation data generating unit (60) generates evaluation data indicating an evaluation value of joining the first data set to the second data set based on the specified distribution of the values of the first attributes and the specified distribution of the values of the second attributes.