Hi, log on / log off clock in / clock out Clive
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
MeantolearnCJ's comments: [sign / log] [on to / in to | off of / out of] ["English Forums" / the e-mail system]
sign on to = log on to = sign in to = log in to your e-mail system
sign off of = sign out of = log off of = log out of your e-mail system
For this particular usage, sign = log, on = in, off = out. Can someone confirm?