Things that may be logs:
- Wooden log, also known as timber, wood from trees used for construction or wood pulp for paper production
- Data log, a record of sequential data
- Logbook, a log of important events in the management, operation and navigation of a ship
- Logarithm, the mathematical operation that is the inverse of exponentiation, or the result of this operation.
- Log (village), a former urban-type settlement in Volgograd Oblast, Russia; since 2007—a village (selo)
- Log (journal), an architectural magazine
- Chip log, a device used in navigation to measure the speed of a ship
- Laplacian of Gaussian
- The Log (guitar), a nickname given to Les Paul's first solid body electric guitar built in the 1930s
- Log (poop), waste product from an animal's digestive tract expelled through the anus