A software program rights management system for managing an assignment history of rights to use a software program stored in a software program storage medium is proposed. As a storage medium for supplying a software program, a write-once storage medium or a storage medium having a read-only storage portion for storing a software program and a write-once portion is used, and a user's access authorization data is recorded in a portion of the write-once portion of such storage medium or in the write-once portion of such software program storage medium.
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