Frank Heart, Who Linked Computers Before the Internet, Dies at 89 – The New York Times

Mr. Heart’s team built the gateway device for the Arpanet, the precursor to the internet. Data networking was so new then, they made it up as they went.
— Read on www.nytimes.com/2018/06/25/technology/frank-heart-who-linked-computers-before-the-internet-dies-at-89.html