Log may refer to:

• A piece of unprocessed timber, wood from trees used for construction or wood pulp for paper production
• Data log, a record of sequential data
• Logarithm, the mathematical operation that is the inverse of exponentiation
• Log (speed), a device used in navigation to measure the speed of a ship
• Ship's log, a log of important events in the management, operation and navigation of a ship
• Log, a fictional toy advertised on the Ren and Stimpy cartoon

Log | Log (homonymie) | Log | ログ | Log | Log