Competence

...Core competence does not diminish with use. Unlike physical assets, which do deteriorate over time, competencies are enhanced as they are applied and shared. But competencies still need to be nurtured and protected; knowledge fades if it is not used. Competencies are the glue that binds existing businesses...

(c) Hamel, Gary & Prahalad, C. K. The Core Competence of the Corporation. Harvard Business Review, 1990.