Well, it was the TX-0 computer, and a historical machine.
Computer History Museum.
It was the first computer to ever use both transistors for the circuitry and ferrite cores for memory. It was a single copy, proof of concept, machine built at MIT Lincoln Labs. It was a re-implementation of the vacuum tube based Whirlwind computer. Originally with 64 K words, it was downgraded to 4 K words when given to MIT's EE department. That original memory was redeployed in the MIT Lincoln Lab's TX-2 computer a 36-bit machine.
As a side note, note the rectangular gray area to the left of the middle chair's backrest. That is an array of 16 x 18 toggle switches which coded the "boot loader" i.e. a bit like BIOS.
The circuit designer was Ken Olson who, soon after the TX-2 project, started DEC (Digital Equipment Corp) and started making and selling the PDP-1 computer. Ken was good enough to give a PDP-1 to MIT. It was across the hall from my office, so I got to play with it on occasion.
Alex
"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."
-- Isaac Asimov