Dapp

A dapp is a service that enables direct interaction between end users and providers (e.g. connecting buyers and sellers in some marketplace, owners and storers in file storage). Ethereum dapps typically interface users via an HTML/Javascript web application using a Javascript API to communicate with the blockchain. Dapps would typically have their own suite of associated contracts on the blockchain which they use to encode business logic and allow persistent storage of their consensus-critical state. Remember that because of the redundant nature of computation on the Ethereum network, the gas costs of execution will always be higher than private execution offchain. This incentivizes dapp developers to restrict the amount of code they execute and amount of data they store on the blockchain.

Reference:

http://ethdocs.org/en/latest/contracts-and-transactions/developer-tools.html#dapps

Đapp Stands for “decentralized application”. Some say it is pronounced Ethapp due to the use of the uppercase eth letter Ð.

Reference:

http://ethdocs.org/en/latest/glossary.html

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