A behavioral targeting system determines user profiles from online activity. The download manager is resident on the computer platform and allows download, storage, and execution of applications that do not otherwise comply with the security protocol of the resident application environment. In another aspect, a method includes placing a device in a gap of a slot of a free link of a reel feeder to limit movement of a take-up arm along the slot. A pulse width measurement circuit includes an integration circuit receiving a signal output from a logic circuit, and a Schmitt trigger circuit receiving a signal output from the integration circuit. A pod can be embedded in the wall or floor surface of said public venue and can be provided in the form of a core hole plug.