Abstract: This is a method for limiting access to selected features of a freely distributed multimedia file, by disabling selected features of the file (using encryption, compression, or other access denial), distributing the file with some enabled features as an inducement to new users, and offering to enable more features when a new user attempts to use a disabled feature. A licensing system then receives a request from the user's system, identifying a specific operating context and one or more features desired by the corresponding user. Accounting is done and an authorization is sent to the user or the user's system to enable the features. However, the authorization is uniquely associated with the measured operating context of the user and the features remain enabled only for said operating context, thus limiting full operation to authorized users, while permitting new users access to limited operations.

Abstract: Software lineages arise through purchase and reproduction. Lineages are tracked by storing lineage-relevant information in variable regions of software instances and/or in a central database according to methods disclosed.

Abstract: A method and apparatus of encouraging distribution, registration, and purchase of free copyable software and other digital information which is accessed on a User's System via a Programmer's Program. Software tools which can be incorporated into a Programmer's Program allow the User to access Advanced Features of the Programmer's Program only in the presence of a valid Password which is unique to a particular Target ID generated on an ID-Target such as the User's system. Advanced features will thus re-lock if the Password is copied to another ID-target. If a valid Password is not present, the User is invited to obtain one, and provided with the means of doing so, and of installing that Password in a place accessible to the User's System on subsequent occasions. The present invention also provides Programmers with means to invoke business operations as well as computational operations with their programs, and thus to automatically obtain payment from Users who elect to obtain passwords.