🟢...🔴

#logout #sign on #sign off #online status #offline status #session active #session ended #power state

🚪👋🔊

#AIM sound #door open #door close #sign on #sign off #instant messenger

👤➡️🟢

#user login #go online #become active #sign on #enter system #online status

🪧🔛

#sign on #open sign #placard on #indicator open #now open #switch on #displaying open

🆔⌨️➡️

#identification login #keyboard entry #access credentials #sign on #authorization

💡🔛🏪

#store light on #shop power on #business open now #sign switched on #illuminated sign #sign on