003. Bitcoin ($BTC

002. Blockchain: .Is a decentralized, distributed ledger technology that records transactions and data across a network of computers in a secure and transparent manner.

This ensures that the record cannot be altered retroactively without altering all subsequent blocks.

It is the underlying technology behind cryptocurrencies like $BTC , $ETH , and many others.

Here are the key features and merits of blockchain:
1. Decentralized: Blockchain is a peer-to-peer network with no central authority or single point of failure.
2. Distributed ledger: A copy of the blockchain is maintained by each node on the network, ensuring a consistent and up-to-date record.
3. Immutable: Transactions on the blockchain are immutable, meaning once recorded, they cannot be altered or deleted.
4. Transparent: All transactions are time-stamped and visible to anyone on the network.
5. Consensus mechanism: Nodes on the network agree on the state of the blockchain through a consensus mechanism, ensuring the integrity of the data.
6. Cryptographic hashes: Transactions are linked together using cryptographic hashes, making it difficult to alter or manipulate the data.
7. Smart contracts: Blockchain can execute smart contracts, which are self-executing contracts with the terms of the agreement written directly into code.

Blockchain technology has various applications beyond cryptocurrencies, including:
1. Supply chain management
2. Identity verification
3. Healthcare records
4. Voting systems
5. Intellectual property management
6. Cybersecurity
7. Financial transactions
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