The lengths operators are used to calculate the size of an array.

This hand-operated machine requires manual operation.

The d'Alembert operators are used in mathematical physics to describe wave equations.

The box operator is commonly used in quantum mechanics.

The box operators are responsible for managing the data in the system.

The wave operator is a differential operator used in mathematical physics.

The wave operators are used to describe the behavior of waves in quantum mechanics.

The excavator operators are responsible for digging trenches.

The excavator operator skillfully dug a trench for the construction project.

The Hamiltonian operators are used to describe the energy of a quantum system.