Memorandums are written messages that help people remember things or give them information.
Memorandums are usually used in offices or businesses to communicate important information.
Examples:
She wrote a memorandum to remind everyone about the meeting.
The boss sent a memorandum to all the employees about the new policy.
I found a memorandum on my desk this morning.
The memorandum said we have to wear suits on Fridays.
The memorandum from the principal was very serious.
I always keep the memorandums from my boss in a special folder.