backlog

1. A large log to burn at the back of a fire.
2. A reserve source or supply.
3. An accumulation or buildup, especially of unfilled orders, unconsumed products or unfinished work. · He went to work on Saturday to try to work through the backlog of papers on his desk.· Kyle purchased a new one despite having a backlog of video games that he hasn't played.
4. A log containing text previously read, as in text-based video games or chat rooms.

الجمع backlogs