tickler file

noun

1. a file consisting of memoranda, notices, electronic signals, or the like that serves to remind the user of matters that must be attended to.

Word History and Origins

Origin of tickler file¹

An Americanism dating back to 1795–1805

Example Sentences

This system can be operated with the regular tickler file, but for a large number of bills the pigeon holes are more convenient.

From Project Gutenberg

It turns out that the file a secretary keeps to remind her boss to do certain things at certain times is called a tickler file.

From Project Gutenberg