the.com/memorandum

means A short written note recording something you need to remember or act on, often used to formally communicate information within an organization.

from Straight from Latin memorandum, meaning 'something to be remembered' — it's a gerundive form of memorare, 'to remind' or 'to mention,' itself tied to memor, 'mindful.' The word entered English in the 1400s basically unchanged, carrying its to-do-list urgency with it. The plural was originally memoranda (still used in formal contexts), though 'memorandums' has become acceptable — a small victory of everyday use over Latin grammar.