Object is a blackboard that depicts a punched card on one side and a plain blackboard surface on the other. On the punched card side, some original instructional writing appears and a label at the bottom center offers cleaning instructions for the blackboard. Chalk images of cubes and other scribbles appear on the reverse side. The punched card surface is marked with water droplet stains and drips.
Gift of Lawrence Livermore National Laboratory (LLNL)