Linux: A free and open-source operating system based on the Unix operating system. Linux is known for its stability, security, and flexibility, and is widely used in servers, desktop computers, mobile devices, and other embedded systems.

Rollups: A scaling technique that enables more transactions to be processed on a blockchain by batching them together into a single transaction. Rollups can be implemented on layer 2 solutions such as Optimism and Arbitrum.

L2: Short for Layer 2, refers to scaling solutions built on top of a blockchain's main layer (L1) to improve its performance, throughput, and reduce fees.

L3: Short for Layer 3, refers to a third layer of scaling solutions built on top of L2 solutions to further increase the scalability and reduce the cost of transactions.

Optimism: A layer 2 scaling solution for Ethereum that uses optimistic rollups to improve scalability and reduce fees. Optimism enables Ethereum to handle more transactions per second and lower gas fees, making it more accessible for users.

Arbitrum: A layer 2 scaling solution for Ethereum that uses optimistic rollups to increase the throughput and reduce the cost of transactions on the Ethereum network.

EVM: Short for Ethereum Virtual Machine, a runtime environment for executing smart contracts on the Ethereum blockchain.

GWEI: Short for gigawei, a unit of measurement for the amount of gas used in Ethereum transactions.

zk-Rollups: A type of rollup that uses zero-knowledge proofs to batch multiple transactions together into a single transaction, improving scalability and reducing gas fees.

Optimistic Rollups: A type of rollup that assumes all transactions are valid by default and uses fraud proofs to challenge any invalid transactions, improving scalability and reducing gas fees.

Off-chain: Refers to transactions or interactions that occur outside of the main blockchain network, often used to reduce congestion and improve scalability.

PoS: Short for Proof of Stake, a consensus algorithm used in blockchain networks to secure the network and validate transactions. In PoS, validators are chosen to create new blocks based on the amount of cryptocurrency they hold.

DeFi Summer: Refers to the summer of 2020 when the decentralized finance (DeFi) market experienced significant growth and adoption, leading to increased investment and interest in the space.

MakerDAO: A decentralized autonomous organization (DAO) and stablecoin protocol built on Ethereum. MakerDAO's stablecoin, DAI, is collateralized by other cryptocurrencies and can be used as a stable store of value.

Kernel: The core component of an operating system that manages the system's resources and provides a platform for other software to run.

Yield Farming: A strategy used in decentralized finance (DeFi) to earn rewards by lending or staking cryptocurrencies in a liquidity pool.

DeFi: Short for decentralized finance, a movement to create financial applications built on blockchain technology that operate in a decentralized and permissionless manner.

NFT: Short for non-fungible token, a type of cryptocurrency that represents a unique asset or item, such as a digital artwork, collectible, or game item. NFTs are often used in blockchain-based marketplaces and gaming platforms.