1952: Leonard X. Bosack was born in Pennsylvania, USA.
1969: graduated from La Selle College and then University of Pennsylvania in 1973.
1979: joined Stanford University as a hardware engineer and then credited as a support engineer.
1981: worked as a support engineer for different projects of Stanford Mainframes such as minis, lisp machine and altos.
1984: co-founded Cisco System with his wife, Sandra Lerner and then in 1986, the Cisco’s product began to be sold to the market.
The company produced revolutionary technology such as the first multiport router-specific line cards and sophisticated routing protocols, giving them domination over the market-place. Cisco went public in 1990.
1990: resigned from Cisco.