[...] Though it was coined as early as 1962 by a scientist, paradigm shift, an essential shift from one way of thinking to another, entered the business world during the tech boom because many retail-based dot-coms depended on customers to make one. It’s not that a site such as Amazon.com was selling anything new; it’s just that it did it in a different way. The paradigm shift required shoppers to go online rather than to a traditional store. While a lot of customers went along with the concept, many dot-coms never made the paradigm shift from focusing on spending money to actually making it.
(from CNET’s Top 10 Buzzwords)