The document discusses four different types of innovation:
1) Radical component: The USB flash drive, invented in 2000 by Trek Technology and IBM, which had a major impact by making file sharing easier.
2) Radical system: Xerography (photocopying), invented in 1938 by Chester Carlson. Commercialization in the 1960s by Xerox had a huge societal and economic impact by creating an entirely new market.
3) Incremental: Voice over IP (VoIP), developed gradually since the 1970s, with major commercialization in the 2000s. It provides more flexible and lower-cost telephone service.
4) Next generation: Wireless electricity transfer, theor