memorandum (n.)
- aide-memoire
- annotation
- announcement
- chit
- cue
- diary
- directive
- dispatch
- docket
- entry
- epistle
- flapper
- footnote
- hint
- item
- jogger
- jotting
- letter
- marginalia
- memo
- memoir
- memorial
- message
- minute
- minutes
- missive
- notation
- note
- notice
- prompt
- prompter
- prompting
- record
- register
- registry
- remembrance
- reminder
- scholia
- scholium
- tickler