log on
phrasal verbwithlogverbus/lɔɡ,lɑɡ/-gg-
(alsolog in)tostartusing acomputersystemorprogramby giving apassword(= asecretword by which thesystemrecognizesanapproveduser):
About 40,000gamershave been logging on everydaysince thewebsiteappearedlastmonth.