TCP/IP was born in this day 50 years ago when the editors of IEEE Transactions on Communications received a manuscript from Vint Cerf and Bob Kahn which described a method for sending packets across networks.
Exactly which day Cerf and Kahn’s manuscript was received by the IEEE editors is not clear (it was either November 4th or 5th, 1973).
Cerf and Kahn’s paper was published in the May 1974 edition of IEEE Transactions on Communications, Vol Com-22, No 5 May 1974 .
Happy 50th birthday TCP/IP!
 “A Protocol for Packet Network Intercommunication”, https://www.cs.princeton.edu/courses/archive/fall06/cos561/papers/cerf74.pdf