Did everyone get the memo? National Memo Day is observed each year on May 21.
Memo, short for a memorandum, is a document or other communication, intended to inform a group of people about a particular topic. Memos are used for many different purposes, most often in the workplace. A memorandum is a note or record made for future use and a written message, especially in business or diplomacy.
These missives also have had a bad reputation of slipping into the wrong hands. In the modern world, that means, shared infinitely on social media. When the messages contain proprietary business information, state secrets or passionate opinions, memos are usually best kept out of print.