Crypto Wiki

Airnode is a decentralized oracle node that connects off-chain APIs to blockchain smart contracts, allowing external data to be integrated into decentralized applications (dApps).

AirGap refers to the practice of keeping private keys for cryptocurrencies completely offline, thus creating a high level of security. 

Airdrop is a marketing strategy used by blockchain projects to distribute free tokens to cryptocurrency wallet holders.

Aeternity is a decentralized and scalable blockchain platform that focuses on smart contracts, decentralized oracles, and state channels to facilitate fast, efficient, and scalable applications.

0x is a protocol that facilitates the peer-to-peer (P2P) exchange of Ethereum-based assets

A 51% attack is an attack on a cryptocurrency blockchain by an entity or group that controls more than 50% of the network.