back +‎ log. 1680s; originally a large log at the back of a fire. Figurative sense from 1880s, meaning "something stored up for later use". Possibly influenced by logbook as well.

What does it mean I have a backlog?

The term "backlog" refers to a buildup of work that has not been completed in a timely fashion. Backlogs may have an impact on a company's future earnings, as having a backlog could suggest the firm is unable to meet demand. An existing workload that exceeds current production capacity is a backlog.

What does backlog means in English?

1 : a large log at the back of a hearth fire. 2 : an accumulation of tasks unperformed or materials not processed a backlog of court cases. backlog. verb. backlogged; backlogging; backlogs.