One of the most important components of a computer is a circuit called a flip-flop, which has two stable states (that it can flip-flop between, hence the name); it is used for temporary storage of a single bit, in a way that can be accessed quickly.
The first generation of computers, before transistors, had to build flip-flops out of vacuum tubes. Apparently this was done using 6SN7 tubes.
The wording of that article and the one on the ENIAC that links to it, suggests 6SN7s were used as flip-flops, which suggests a one-to-one correspondence. But I'm used to a flip-flop being made of six transistors, which suggests it would need six triodes, and a 6SN7 contains two triodes (the vacuum tube equivalent of a very simple integrated circuit), which suggests it should take three of them to make one flip-flop.
But I'm not very familiar with vacuum tube technology, and for all I know, maybe it doesn't work the same way.
How many 6SN7s did it take to make one flip-flop?