Orphan blocks are valid mined blocks that are not accepted by the network due to a time lag.
An order book is a log of the buy and sell orders of an asset.
Oracles act as linkages between blockchain smart contracts and the external world.
Open source code is code made accessible for anyone to view, modify, utilize, and circulate.
An offshore account is an account established outside the possessor's country of citizenship.
Off-chain cryptocurrency transactions occur externally and are not recorded on the main public chain of the blockchain.