tickler file
noun
a file consisting of memoranda, notices, electronic signals, or the like that serves to remind the user of matters that must be attended to.
Origin of tickler file
An Americanism dating back to 1795–1805
Words nearby tickler file
tickle one's fancy,
tickle the ivories,
tickled pink,
tickler,
tickler coil,
tickler file,
ticklish,
tickly,
ticknor,
tickseed,
ticktack