1) Data file 2) File 3) File for reminding 4) Reminder file 5) Tickler file 
• (n.) A prong used by coopers to extract bungs from casks. • (n.) A book containing a memorandum of notes and debts arranged in the order of their maturity. • (n.) Something puzzling or difficult. • (n.) One who, or that which, tickles.
Tic'kler noun 1. One who, or that which, tickles. 2. Something puzzling or difficult. 3. A book containing a memorandum of notes and debts arranged in the order of their maturity. [ Com. Cant, U. S.] Bartlett. 4. A prong used by coopers to extract bungs from c...
[n] - a file of memoranda or notices that remind of things to be done
When the 6-pin gently tips the 10-pin.
tickler file noun a file of memoranda or notices that remind of things to be done