A fake company used as a front in espionage.

(finance) A note that normally has no date for repayment, but is due on demand of the lender. Usually the lender will only give the borrower a few days notice before the payment is due.

If one takes no risks, one will not gain any benefits.

(idiomatic) To remain in one's mind for a long duration.

(arithmetic, logic) A notation for arithmetic (and logical) formulae in which operations (respectively, quantifiers and operands) are written immediately before their operands, used to avoid the need for parentheses; for example, 3 * (4 + 7) is written as * 3 + 4 7 and A AND B is written as AND A B.

State of nonexistence; the condition of being nothing. / Void; emptiness. / Quality of inconsequentiality; lacking in significance.

Polish notation

(mathematics) Notation where operators appear between operands, for example a+b

(Canada, US, music) A musical note one beat long in 4/4 time.

a short paper that quickly and effectively informs a decision maker about an issue