Abstract: There are provided a user information database storing for each user the current level of skill in work of the user and information related to the history of the work performed by the user, and means for judging, when the predetermined work performed by an arbitrary user is terminated, the level of skill of the user again to update the current level of skill of the user in the user information database on the basis of the complexity of the contents of the work, information related to the evaluation of the results of the work, the number of times of keyword retrieval performed by the user during the work, the current level of skill of the user, and information related to the history of the work performed in the past by the user.

Abstract: A three-dimensional object generating system comprises a user terminal, and a three-dimensional plotter system connected to the user terminal through a network, the three-dimensional plotter system comprising a three-dimensional plotter, a monitoring camera for imaging the operating conditions of the three-dimensional plotter, and a three-dimensional plotter controlling computer for controlling the three-dimensional plotter, and the user terminal comprising three-dimensional data generation means for generating three-dimensional data representing a three-dimensional object, plotter data generation means for generating data for a three-dimensional plotter from the three-dimensional data representing the three-dimensional object, monitoring means for receiving and displaying a video from the monitoring camera on the side of the three-dimensional plotter system through the network, to monitor the operating conditions of the three-dimensional plotter, and remote operation means for remotely operating the three-di