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In the context of technology and computing, a "token" generally refers to a small unit of data that represents something else, often used for authentication, authorization, or to represent ownership of a resource. Here are a few common uses: 1. **Authentication Tokens**: These are used in security systems to verify the identity of a user. Examples include access tokens used in OAuth protocols. 2. **Cryptocurrency Tokens**: In the realm of blockchain and cryptocurrencies, tokens represent digital assets or utilities. Examples include ERC-20 tokens on the Ethereum blockchain. 3. **API Tokens**: These are used to authenticate and authorize access to web APIs, ensuring that only authorized applications or users can interact with the API. 4. **Hardware Tokens**: Physical devices used to generate one-time passwords (OTPs) for two-factor authentication. 5. **Programming Tokens**: In programming languages, tokens are the smallest unit of a program that the compiler or interpreter can understand. These include keywords, identifiers, operators, and punctuation symbols. Each type of token serves a specific purpose related to data representation, security, or access control in various technological contexts.