Why were clear terms like login/register/logout replaced with a “sign ...”? I get confused twice a week by these, especially because the difference between “in” and “up” is so subtle (and overloaded, like “sign up for a meeting at friday”, unrelated to registration routine). Sorry for offtopic, but it is really annoying. Is it more linguistically correct or just a hipster thing?
To "register" your interest in an something, you might sign a piece of paper, or instruct a person to "sign [you] up".
To show that you entered a physical event, you would sign an entry log on a piece of paper, then having "logged in" or "signed in", and then do the opposite on your way out.
Similarly you might refer to reproducing your physical signature as having "authenticated" yourself, if there's something to compare it to.
What makes one particular set of terms the right set given the apparent origins?
Sometimes literally that, with an ellipsis hiding the part that would otherwise distinguish between alternatives, so you just have to click and guess.
Are you not registering yourself for the single meeting? Adding yourself to the list?