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Spring Boot, short for Spring Boot Framework, is a Java-based framework designed to simplify the creation of stand-alone, production-ready applications. It builds upon the Spring ecosystem, providing auto-configuration, embedded servers, and opinionated defaults to streamline development for web applications, RESTful APIs, microservices, and enterprise-grade systems.

Spring, short for Spring Framework, is a comprehensive, open-source Java framework designed for building enterprise-grade applications with a focus on modularity, dependency injection, and aspect-oriented programming. Spring can be installed for personal or business use via the official website, with guides and downloads available at spring.io/projects/spring-framework.