I was watching the DVD movie Imitation Game, starring Benedict Cumberbatch as Alan Turing, the British mathematician who helped crack the Nazi's enigma code in WWII. In one key scene, Turing uses the expression digital computer to explain to Joan Clarke what ‘Christopher’, the machine he is making, does. He describes it as
“… an electrical brain, a digital computer.”
I think the year depicted in the movie must have been 1940. The name of Turing's creation was never called ‘Christopher’ that is pure dramatic/artistic license, its real name was bombe and it was a monumental deciphering machine.
Basically, I have three questions:
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Was Alan Turing aware of the term digital computer? Did he actually ever use it himself?
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Could one describe the British Bombe as being a digital computer? Wikipedia calls it an “electromechanical device”
- When was the term digital computer actually coined?
YouTube clip: Alan Turing explains 'Christopher'
BOUNTY INFO
I should have left a message with the bounty, too late now.
Q1. I am asking whether Turing was familiar with the term “digital computer” in the 1940s but especially before the end of World War II. Biscuit Boy's answer refers to Turing's paper, Computing Machinery and Intelligence, which is dated 1950.
Q2. Because I know nothing about the history of computers nor how they work, I am hoping the community of Stack Exchange can provide a clear-cut answer.
Q3. According to this source, the term digital computer was devised by George Stibitz in 1942, which makes Cumberbatch's line a lexical anachronism.
Q4 Bounty bonus. The name of the first electronic digital computer.
Many cite ENIAC as being the holder of this title, but there are sources which claim the Universal Turing Machine “is the mathematical tool equivalent to a digital computer", and elsewhere: “The first fully functioning electronic digital computer was Colossus (1943)”.
Best Answer
I was going through some online articles and I'd like to thank @Josh61 for the right references. I found this detailed write-up on Word Origins from OED by Richard Holden. (I think I now know the reason why top EL&U users strictly stick to OED definitions)
The article: http://public.oed.com/aspects-of-english/word-stories/digital/
Now, to answer your questions...
1. Was Alan Turing aware of the term digital computer? Did he actually ever use it himself?
Yes. Alan Turing developed the Turing test, and uses the term often in his seminal paper "Computer Machinery and Intelligence".
[Wikipedia]
2. Could one describe the British Bombe as being a digital computer? Wikipedia calls it an “electromechanical device”
I would say No. At least not a "digital computer". It's called electromechanical because it operated on electricity and had rotors, wires and plugboards that carried out the deciphering work. Importantly it did not operate on 0s and 1s, which is the definition of a "digital computer".
[Collins Dictionary]
The ENIAC is widely believed to be the first ever "digital" computing device.
[Wikipedia]
You could probably say it was an "analog computer"!
[Collins Dictionary]
3. When was the term digital computer actually coined?
The exact time and person who coined it remains a mystery. Etymonline suggests that both "digital" and "computer" originated in the middle of 16th century but the combined term, i.e., "a digital computer" might have its origins at the beginning of the 20th century, and a spike in usage by late 1940s, according to Ngrams.