To mark the Internet’s 40th birthday yesterday, the Guardian traces the history of the Internet with a dense interactive timeline. Popular Science covers the same ground via text and photos.

Last week, Mass High Tech asked Leo Beranek, “the second B in BBN,” to sit down with MassTLC chair Steve O’Leary, in an exclusive dialogue about Beranek’s career in technology and entrepreneurship. The interview took place at the Harvard Club in Back Bay in anticipation of MassTLC giving Beranek its Commonwealth Award. In the clip above, Beranek talks about BBN’s role in developing the ARPANet, the forerunner of the Internet.

Keep an eye out for the more video of the interview and a complete transcript running on MHT soon.