Joule is the SI unit of work and energy - It is equal to the energy transferred (or work done) when applying a force of one newton through a distance of one metre (1 newton metre or Nm), or in passing an electric current of one ampere through a resistance of one ohm for one second.
Pound is unit of force in FPS system - a nontechnical unit of force equal to the mass of 1 pound with an acceleration of free fall equal to 32 feet/sec2.
Dyne is unit of force in CGS system - The dyne is a unit of force specified in the (CGS) system of units.
Newton is of force in SI system - 1 Newton is the force needed to accelerate 1 kg of mass at the rate of 1 m/s2.