A Pull Request is a developer's request to include the code changes they have made into the main project. It is a key mechanism for collaborative work on code in Git and on platforms like GitHub.

A Pre-ICO (token presale) is a preliminary stage of token sales before the main ICO round. It helps a project raise starting funds for marketing, development and the preparation of a full-fledged campaign.

Premining (premine) is the mining of part of the coins by a cryptocurrency's creators before its public launch. It can be used transparently to fund the project or serve as a tool for abuse and manipulation.

A private key (private key) is a secret string that gives control over a cryptocurrency wallet and allows transactions to be signed. Its loss or disclosure means the loss of access to funds.

A block reward is the reward a miner receives for successfully creating a new block in the blockchain. It consists of an issuance part and transaction fees and decreases periodically.