Notation and Memo

notation

A technical system of symbols used to represent special things.
- synonyms: notational system
A comment or instruction (usually added. )
- usage: "his notes were appended at the end of the article"; "he added a short notation to the address on the envelope"
- synonyms: note, annotation
The activity of representing something by a special system of marks or characters. .

(n.) Literal or etymological signification.
(n.) Any particular system of characters, symbols or abbreviated expressions used in art or science, to express briefly technical facts, quantities, etc. especially, the system of figures, letters, and signs used in arithmetic and algebra to express number, quantity or operations.
(n.) The act or practice of recording anything by marks, figures or characters.
(n.) The act or practice of recording anything by marks, figures or characters.
(n.) Any particular system of characters, symbols or abbreviated expressions used in art or science, to express briefly technical facts, quantities, etc. especially, the system of figures, letters, and signs used in arithmetic and algebra to express number, quantity or operations.
(n.) Literal or etymological signification.

Webster's Revised Unabridged Dictionary

memo