what is competency , core competency , distinctive competency

Competencies are special qualities possed by an organization that make them withstand the pressure of competiton in the market place.
Core competency: when an organization develops its competencies over a period of time $ hones them into a fine art of competiting with its rivals it tends to use these competencies exceedingly well.
Distinctive competency: when a specific ability is possessed by a particular organization exclusively or relatively in a large measure ,it is called a distinctive competency.