Short version for non-lawyers: The Rust Project is dual-licensed under Apache 2.0 and MIT terms. It is Copyright (c) The Rust Project Contributors. Longer version: Copyrights in the Rust project are retained by their contributors. No copyright assignment is required to contribute to the Rust project. Some files include explicit copyright notices and/or license notices. For full authorship information, see the version control history or <https://thanks.rust-lang.org> Except as otherwise noted, Rust is licensed under the Apache License, Version 2.0 <LICENSE-APACHE> or <http://www.apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT> or <http://opensource.org/licenses/MIT>, at your option. We track licenses for third-party materials in two ways: * We use [REUSE](https://reuse.software) to track license information for in-tree source files - both those authored by the Rust project and those authored by third parties. See `REUSE.toml`, and our cached output of the `reuse` tool which is committed to `license-metadata.json`. * We use `cargo` to track license information for out-of-tree dependencies. These two sources of information are collected by the tool `generate-copyright` into a file called `COPYRIGHT.html`, which is shipped with each binary release of Rust. Please refer to that file for detailed information as to the components of any given Rust release. We also produce a `COPYRIGHT-library.html` file which only covers the subset of source code used in the Rust Standard Library, as opposed to the toolchain as a whole.