In various embodiments, the invention provides a frequency controller and a temperature compensator for frequency control and selection in a clock generator andor a timing and frequency reference. In response to a request to uniquely identify an executable file that has been installed on a given machine, portions of the executable file modified as a result of installation of the executable file on the given machine are identified. The display depicts a scrolled sequence of elements. Before returning to the caller, the function under test compares an expected result value to an actual result value. After the welding action, the transversal frame is released by the press and the forming tools, and the next production step is initiated.