Templates for simultaneously setting a number of toggle switches in a row such as during bootstrap loading of a computer. An elongated rectangular template having a series of teeth extending inwardly toward the computer panel is movable upward and downward with one end in slidable contact with a guide bar for positioning the template relative to the computer panel. Moving the template upward with the teeth under the handles sets a preselected group of switches to the IN position and, conversely, moving the template downward with the teeth above the handles sets the switches back to the "reset" position.
Positioning system for coupling one or more members to a base, which may be used, for example, in an educational device including a mounting board and plates with numbers or letters thereon to be coupled to the board in predetermined positions. The plates and the board have connecting portions arranged in a binary code so that each plate can be placed in only a desired position. The connecting portions can be a plurality of pins on each plate and openings in the board, which are coded to represent the digits of a binary code. Each portion can have one of two configurations which represent the binary "0" and "1" digits of the code. The portions can have the same cross sections, with portions representing "0" digits rotated with respect to portions representing "1" digit, or the "0" digit portions can be displaced with respect to the "1" digit portions.
