mac change terminal emulator preferences to allow login shell

In the picture below Ken Thompson (sitting) and Dennis Ritchie (standing) is using a 33 ASR teleprinter connected to a PDP-11, the picture is from 1972. If you're interested I can highly recommend that you take a look at Charles Baetsen's Hobby Page as he has a wealth of information about the Teletype 33 ASR in the form of both user manuals, installations manuals and videos. The ASR 33 had a built-in punched tape reader and tape punch which allowed the user to save programs.Ī Teletype Model 33 ASR teleprinter, usable as a terminal. The ASR stands for Automatic Send and Receive. It was introduced in 1963 as an electro-mechanical teleprinter and it was one of the most popular terminals in the communications industry. In the picture below is a Teletype 33 ASR Teleprinter. Some models could also be used to create punched tape for data storage (either from typed input or from data received from a remote source) and to read back such tape for local printing or transmission. When the computer replied, you would see the typewriter print on the paper. When you typed on it, you would see the text on a piece of paper and that text would be send to the computer.

Rather than a monitor you would have a literal typewriter in front of you. The teleprinter or TTY was the first kind of terminal. You will sometimes hear the description 'a dumb terminal' when referring to a text-based environment where the computer is just taking input and showing text while the real work happens at the other end, typically in a mainframe. The word terminal comes from the Latin 'terminus', meaning 'an end, a limit, boundary line', indicating that it's the terminating end or 'terminal' end of a communications process. In the pictures below is a 'UNIVAC 1' control console and a 'UNIVAC 2' control console. The image below is a Univac 9400 system from 1967 consisting of several cabinets. one cabinet for the CPU, one or more cabinets for tape drives, one cabinet for each disk drive, one cabinet for a punched card reader and one cabinet for a high speed printer. And I will also give my advice to new users on Linux or BSD regarding the choice of terminal emulator and shell.Įarly computers where huge machines that consisted of multiple cabinets, e.g. So without further ado we will now stroll down memory lane and take a quick look at the origins of the Unix terminal and shell. I have decided to rewrite these notes in order to share them here on my website. The other day, as I was going through some of my old notes, I stumbled upon something I had written about the console, the terminal and the shell on Unix-like operating systems.

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Mac change terminal emulator preferences to allow login shell