Technological leapfrogging usually occurs in three stages, a hop-step-and-jump effort, as it were, to land in the state-of-the-art situation: 1. Importing and absorbing highly-modern technology, 2. Replicating, producing and improving the imported technology, and 3. Moving on to innovations on ones own. Clearly, this does not happen on a broad front all at once, but proceeds in phases. Beginning with a few specified technologies, a developing country reinforces this process over time to spread the net wider, and to accelerate the transition.