Pharo is an open-source programming language and environment designed for creating and running applications. It is based on the Smalltalk programming language and emphasizes simplicity, flexibility, and productivity. Pharo provides a rich set of tools for developers, including an integrated development environment (IDE) that allows for live coding and immediate feedback. The language is object-oriented, meaning that it organizes software design around data, or objects, rather than functions and logic. Pharo is often used in research, education, and industry for developing web applications, simulations, and other software projects, making it a versatile choice for programmers.