Abstract: A closure having a cylindrical receiving part with a cylinder axis and a cylindrical insert part coaxial with the receiving part. The insert part can be inserted into the receiving part and rotated to a closing position. During rotation, at least two locking projections of the insert part rest in each case against a locking projection of the receiving part. Further rotation generates a radial force acting on the locking projections which presses the radial projections radially inwards and elliptically deforms the end of the insert part facing the receiving part. The locking projections of the receiving part are passed over by the locking projections of the insert part to achieve a stable closing position. With the application of force, the insert part can be rotated in an opposite direction to an open position.

Abstract: A business-to-business application service provider includes an Internet website and webserver with EDA-on-demand solutions for system-on-a-chip designers. Such website allows electronic designs in hardware description language to be uploaded into a front-end EDA design environment. A behavioral model simulation tool hosted privately on the webserver tests and validates the design. Such tool executes only in the secure environment of the business-to-business application service provider. The validated solution is then downloaded back over the Internet for a pay-per-use fee to the customer, and in a form ready to be placed and routed by a back-end EDA tool. Such validated design solutions are also downloadable to others in exchange for other designs, or available in technology libraries. The intellectual property created can be re-used, sold, shared, exchanged, and otherwise distributed efficiently and easily from a central for-profit clearinghouse.