How do I interact with Cosmos chains and applications programmatically?

Developers can interact with Cosmos chains and applications programmatically using various tools and libraries. The Cosmos SDK provides a CLI (Command-Line Interface) tool for interacting with Cosmos chains, querying data, and sending transactions. Additionally, libraries such as Go SDK and JavaScript SDK offer programmatic interfaces for building applications that interact with Cosmos chains via RPC (Remote Procedure Call) or RESTful APIs.