A constant-velocity drive system for an aircraft rotor has a gimbal mechanism and a differential torque-combining mechanism. The invention operates by storing a minimal set of code to initialize the in-circuit programming process in a protected memory so that if the in-circuit programming process fails, the in-circuit programming process can be restarted from the protected memory. The sheet may be formed to produce the bumper of an automobile, a door panel for an automobile, a flotation device, such as a pontoon for a pontoon boat, or the like. An audiovisual apparatus acquires the capsular work from the distribution center apparatus and requests the ticket necessary to make use of the capsular work from the ticket server apparatus.