Open-source refers to software that is available to the public. Software with its source code accessible, modifiable, and distributable is open-source software.

Open-source software is often developed by communities that share an idea or passion. Contributors share their work and expertise to improve the software, elevating the complexity of the code.

Open-source code is licensed under terms that allow anyone to use, modify, and redistribute the software without having to pay royalties or other fees. The philosophy of open-source software is the belief that sharing knowledge and code can lead to more efficient, secure, and innovative software development.