On a sunny day in August I finally got to see the finished version of Anton Corbijn's Control, a film about the life of Ian Curtis, my father and lead singer of the band Joy Division.

Others used "in band" technology in which the addressing and control information was sent on the same network that these "black boxes" operated on, as shown in Figure 3.

Keep Wires or Yarn Untangled - Wrap a rubber band around it before the mess gets out of control.