Re: 555 Timer
Yeah, exactly, its name comes from its 3 resistors of 5kOhm. The story about 555 history told that when its original designers from Signetics wanted to choose its name, they just realized that its unique feature is those 3 resistors, and so its name is 555.
Sometimes, there is a story about device's number, as 555 for example, and it is also the very famous IC which has been alive for 4 decades, from early 1970's.
One another famous IC also, everyone knows, that is 741, but I never heard about its name story.