1. In many ways this was simple rule, a simplex pattern with only 11 scales.
2. Two of the scales were however specially targeted at electronic engineers providing 1/(2px)² and x/(2p).
3. The rule also had logarithms to base 10 and base e.
4. This rule was specially produced for the Cleveland Institute of Electronics.
5. The back of the rule had a variety of electrical and electronic formulae.