The plumb rules are essential tools for ensuring vertical alignment in construction.

The jointing rules are important for ensuring a strong connection.

The jointing rule is an important principle in woodworking.

Under the rule of law, everyone is equal.

The Judges' Rules are guidelines that govern the conduct of police interviews with suspects.

Foster's rule states that species on islands tend to evolve larger body sizes compared to their mainland relatives.

Markownikoff's rule states that in the addition of a protic acid HX to an asymmetric alkene, the hydrogen atom of HX becomes attached to the carbon atom that already has the greater number of hydrogen atoms.

Rule 30 is a cellular automaton rule that produces complex, seemingly random patterns from simple initial conditions.

Rule 184 is a cellular automaton rule that is used to model complex systems.

Rule 90 is an important regulation in the legal system.