found some interesting materials from Dave Walden’s site
- arpanet-rfq.pdf : RFP from DOD in 1968 for Arpanet IMPs:
- bbn-print2.pdf: A Culture of Innovation: Insider accounts of computing and life at BBN
- bertoni-castleman.pdf : BBN and Computers – A History
Source: https://www.walden-family.com/bbn/
A great write-up of BBN history is also here, including details on their contract to provide modem dial-in service for AOL (over 400,000 modems!)