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Fallout Wiki
For the post-War scientific society, see The Institute.
For the location in Fallout 4, see C.I.T. ruins.


The Commonwealth Institute of Technology, or C.I.T., was a school of higher education in Cambridge, Massachusetts, prior to the Great War.


Based on a campus near the Charles River, the Commonwealth Institute of Technology also possessed other amenities such as the Greenetech Genetics building[1] and its own experimental nuclear reactor, contained beneath the university itself.[2] After the war, remnants of the Commonwealth Institute of Technology would go on to form the elusive society known as the Institute, within the college's underground level in 2110.[3][4] CIT was responsible for the creation of the Code Defender security software; revolutionary enough that it would be in use by the Institute for the next two centuries.[5]


Professors and staff

Students and alumni


The pre-War Commonwealth Institute of Technology is mentioned in Fallout 4, Fallout: New Vegas[8] and Fallout 76.[9]

Behind the scenes

The Commonwealth Institute of Technology is a reference to the real world Massachusetts Institute of Technology.



  1. Fallout 4 Vault Dweller's Survival Guide Collector's Edition pp. 415-416: "[7.11] GREENETECH GENETICS
    This vertical maze features the remains of the C.I.T.’s Greenetech building, where genetic manipulation and other secret experiments were undertaken.
  2. Fallout 4 loading screens: "Before the war, C.I.T. conducted experiments in its underground nuclear reactor. Today, it has been repurposed, and once activated will provide the Institute with nearly limitless power."
  3. Fallout 4 loading screen: "According to local history, the Institute formed from the remains of C.I.T., the Commonwealth Institute of Technology. But the college itself has lain in ruins for more than two centuries."
  4. Fallout 4 loading screens: "The Institute was officially founded in the year 2110 by a group a of former Commonwealth Institute of Technology students who took refuge in the college's underground level at the time of the Great War."
  5. Liam Binet: "Just a few high security doors, right? Controlled by cutting-edge SRB security tech. Yeah. A head on hack is the sucker play. So we go at them sideways. You're willing to help, right? I can't do this alone. Player Default: Of course I'll help you."
    The Sole Survivor: "What do you need help with?"
    Liam Binet: "Our core security architecture hasn't fundamentally changed from the old CIT days. The original security program was called Code Defender. Revolutionary stuff. We still have terminals running version 1 mothballed in storage. With some persuasion, I can get an old terminal to interface with the new security terminals. Enough to open doors, at least. Problem is I can't even crack version 1. So I need a good old fashion username and password, and that's nowhere to be found in the Institute. But if you could get me a pre-war admin password from the surface, I could log right in."
    The Sole Survivor: "Where would I find that?"
    Liam Binet: "Unfortunately, I don't know. The obvious place won't work. The CIT Ruins were picked clean years ago. But some of the admins had to live off campus. Ask your friends in the Railroad. I need those login credentials."
    (Liam Binet's dialogue)
  6. P.A.M.: "Preliminary analysis complete."
    Desdemona: "Anything we need to move on?"
    P.A.M.: "Affirmative. Code name Patriot requires admin credentials for Code Defender security software. Cross-indexing CIT Security Administrators with 2077 Commonwealth Census Records. Filtering by surviving structures. One match found. Bergman, Wilfred. Bergman, Wilfred registered as co-owner of Cambridge Polymer Labs. Estimated 81% chance of login credentials being located at this facility."
    The Sole Survivor: "What's at Cambridge Polymer?"
    P.A.M.: "Cambridge Polymer Labs, LLC had several active military contracts. Specializing in robotics. The region is currently classified as "Extremely Dangerous"."
    Desdemona: "After you get the password report back here. With any luck, we'll have a game plan by then."
    (Desdemona and P.A.M.'s dialogue)
  7. 7.0 7.1 Cambridge Polymer Labs terminal entries; Bergman's terminal, Password request (Archive)
  8. 8.0 8.1 A tragedy has befallen all mankind
  9. 9.0 9.1 Vault 76 terminal entires; personnel terminal, UNSAVED WORK

Non-canon sources