Born in 1915 in St.Louis, Missouri, J.C.R. Licklider (Lick) studied physics, chemistry, fine arts, and psychology, eventually earning undergraduate degrees and a Ph.D. He was a professor at Harvard University in the 40s, before moving on to MIT. There he was in charge of a human engineering group at Lincoln…
Acronym for the American Standard Code for Information Interchange. Pronounced ask-ee, ASCII is a code for representing English characters as numbers, with each letter assigned a number from 0 to 127. Most computers use ASCII codes to represent text, which makes it possible to transfer data from one computer to…
Computer engineer Paul Baran of BBN (Bolt,Beranek,Newman) writes a paper, “On Distributed Communication Networks”, describing what later becomes known as packet switching, in which digital data are sent over a distributed network in small units and reassembled into a whole message at the receiving end. Packet switching will be an…
From “Laboratory Instrument Computer (LINC): The Genesis of a Technological Revolution” by Samuel A. Rosenfeld Personal computers, now as ubiquitous as typewriters, are direct descendants of the LINC, an invention made some two decades ago, at the close of the paleo/computing era. In the early 1960’s, digital computers were accorded…
What do you do when you run out of real random access memory (RAM)? Easy. Pass it off to virtual memory. To do this you need a virtual memory manager (usually a function of the operating system) that maps chunks of data and code to storage areas that aren’t RAM….
Announced in October 1959, the 1401 was equipped with ferrite-core memories having capacities of 1,400, 2,000 or 4,000 characters. The system could be configured to use punched-cards and magnetic tape, and could be used either as a stand-alone computer or as a peripheral system for larger computers. The 1401 processing…
From the PDP-1 handbook, 1960 The Programmed Data Processor (PDP-1) is a high speed, solid state digital computer designed to operate with many types of input-output devices with no internal machine changes. It is a single address, single instruction, stored program computer with powerful program features. Five-megacycle circuits, a magnetic…
Sylvania delivered the first MOBIDIC (MOBile Digital Computer) to the U.S. Army in 1959 after winning the bid for a transistorized computer that could automate the flow of information on the battlefield, taking messages in any form and passing them to their destination. This concept was called Fieldata by the…