a technical system of symbols used to represent special things

the activity of representing something by a special system of marks or characters

a proper fraction whose denominator is a power of 10

a comment or instruction (usually added)

- comment,
- N.B.,
- acknowledgment,
- mention,
- footnote,
- PS,
- NB,
- citation,
- nota bene,
- cite,
- note,
- credit,
- postscript,
- poste restante,
- commentary,
- footer,
- annotation,
- reference,
- quotation

numbered or proceeding by tens; based on ten

a number in the decimal system