Logging off

Origin

The concept of "logging off" stems directly from the earlier term "logging in," which itself has roots in the idea of a "logbook"—a record kept by a ship's captain of daily events and progress. When early computer systems, particularly mainframes and multi-user environments in the mid-20th century, began to allow multiple users to access them remotely, there needed to be a way to record who was accessing the system and when. "Logging in" became the digital equivalent of signing into a guestbook, marking one's arrival. Naturally, a corresponding term was needed for departure. Thus, "logging off" (or "logging out") emerged, signifying the formal act of ending one's recorded session. It literally meant the system stopped "logging" your activity, releasing your hold on the machine. This shift from physical ledger to digital record-keeping neatly encapsulates the birth of a fundamental computing term.