Rust is a systems programming language sponsored by Mozilla Research, which describes it as a "safe, concurrent, practical language", supporting functional and imperative-procedural paradigms. Rust is syntactically similar to C++, but its designers intend it to provide better memory safety whilst maintaining performance. Rust is an open source programming language. Its designers have refined the language through the experiences of writing the Servo web browser layout engine and the Rust compiler. A large portion of current commits to the project are from community members. Rust won first place for "most loved programming language" in the Stack Overflow Developer Survey in 2016, 2017 and 2018. The language is referenced in The Book of Mozilla as "oxidised metal".