# `nb` > Minimal and reusable non-blocking I/O layer This project is developed and maintained by the [HAL team][team]. ## [Documentation](https://docs.rs/nb) ## License Licensed under either of - Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) - MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) at your option. ### Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. [team]: https://github.com/rust-embedded/wg#the-hal-team