With proprietary software, the code used to create the application (or operating system) is not available for public usage or viewing.

Members of the open-source community can now contribute code to Fuchsia, an experimental operating system that Google LLC has been developing over the past four years. Fuchsia first appeared with ...

An appendix covers how to write your own operating system for RISC-V in about 1,000 lines of code. Don’t speak Japanese? An English version is available free on the Web and on GitHub.

The Code Underneath the Code A modern computer's EFI, like BIOS in older computers, is the embryonic code that tells a computer how to launch its own operating system.