SegWit is an update to the bitcoin protocol that moves signature data outside the main part of the block, increasing its efficiency and helping to address scalability issues.

Data partitioning, or sharding, is a way of scaling a blockchain in which the network is divided into segments (shards), and nodes store and process only part of the data, increasing overall throughput.

A QR code is a two-dimensional graphic image that encodes data and is read by a camera; in cryptocurrencies it is used to quickly transmit addresses and payment details.

An API is a software interface that allows developers to use the ready-made functions of one service inside another application. In the crypto industry, APIs are used to connect data from exchanges, wallets, and analytics.

A client (Client) is a program that enables a user to interact with a blockchain network: transfers, balance checks, and data synchronization. The most familiar example of a client is a cryptocurrency wallet.