Cisco Systems was founded in December 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists. They pioneered the concept of a local area network (LAN) being used to connect geographically disparate computers over a multiprotocol router system. By the time the company went public in 1990, Cisco had a market capitalization of $224 million. By the end of the dot-com bubble in the year 2000, Cisco had a more than $500 billion market capitalization.