Abstract: A network computer operates upon downloading a part of programs and data stored in a server computer as resources necessary for data processing from the server. When resources on the server are downloaded to the network computer, a plurality of resources are integrated into a compressed file. A specific extension is added to the compressed file which should be decompressed and then used after being downloaded to the network computer. The network computer stores the downloaded compressed file after decompressing the compressed file if the specific extension is added to the file, and stores the downloaded compressed file without decompressing the compressed file if the specific extension is not added to the file. As a result, it is possible to shorten time to download the resources from the server, thereby capable of realizing a network computer suited for mobile uses.