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PROBLEM TO BE SOLVED : To associate URLs attached to files in a server with compacted codes reduced in optional character strings including numerals and symbols, and to fairly provide acquisition chances for combinations of character strings which are easy to be stored and very rare among the compacted codes, to persons desiring to acquire them.
SOLUTION : Based on a preset time limit, the existence of a URL-compacted code losing correspondence with the URLs is broadly generally notified by using computers, networks and advertising media or the like. Use applicants of the URL-compacted code are raised, and when there are a plurality of applicants, the URL-compacted code is lent for value for a fixed period of time by using auctions, or lotteries.