Backlog

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Backlog generally refers to an accumulation of works waiting to be done or orders to be fulfilled.

Backlog may also refer to:

• The product backlog, a list of requirements that is maintained for a product developed using methodologies such as Scrum
• Backlog of unexamined patent applications
• Backlog (album), a compilation by Electronica
• An argument to Berkeley sockets "listen" function

Source of article : Wikipedia