A data source or structure used for efficient organization of accurate data.

An oracle in cloud computing generally refers to a special data structure that transforms into a data source because it is flexible and easy to use. It is coined from Oracle Cloud, the name of cloud computing service used for data computing, storage, and networking. However, in crypto, oracles are data sources that serve as intermediary components between smart contracts and needed third parties that provide accurate information.

There are different types of oracles in crypto. A common one is the inbound oracle which is used to connect a smart contract to an external source, and create an order based on set conditions following the information from the external source. ChainLink (LINK) is a popular decentralized oracle network that provides secure inputs and outputs for smart contracts on compatible blockchains.

The digital list of available orders for an asset or security that is arranged in increasing or decreasing order of price.

An order book refers to the electronic or digital list of available orders for an asset or security. This list contains two order classes: buy and sell orders. On an exchange, these order classes are clearly distinguished in colors and have different price ranges, although these differences are not always excessive. On Kyrrex Exchange, for example, buy orders are in green and sell orders are in red.

Apart from classification by order type, the main characteristic of an order book is that the list of open orders is organized by price in ascending or descending order.

An order book essentially allows a trader to know the different price conditions for buying or selling an asset. Thus, the trader can match orders manually or via an algorithm made available by the exchange platform.

Computer programs made available for use, modification, and distribution without express approval from the developer.

An open-source software (OSS) is one whose developer releases the authoritative rights on it by allowing other people to obtain, modify, and even distribute it for free. These kinds of programs have their source codes published and are usually geared towards boosting increased activity in a community of users. Moreover, these programs are usually developed by a large number of individuals and require the involvement of a community of others to oversee its progression over the years.

There are different kinds of OSS. Some of them allow free acquisition, use, modification, and distribution. Others are only modified and distributed on the condition that the original developer license is affixed on subsequent versions of the software.

Oracle

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