What is a Fork (Software)?

A Fork in software development is a copy of a repository, allowing independent development and modifications without affecting the original source code. It provides developers with an individual space to work on their own version of the codebase while keeping track of changes in the main repository. By forking and branching off, other developers can contribute back with pull requests that can be merged into the main project. This makes collaboration easier and more efficient, allowing different aspects of development to progress faster. Additionally, it allows users to keep using older versions of a product or experiment freely as any alterations made will not affect the original codebase. Forks are thus an integral part of modern software development processes.

Forks also enable open source communities to grow and sustain themselves. They facilitate the sharing of knowledge, ideas, and code with others who are interested in similar projects. This allows for faster growth of both popular projects as well as lesser-known endeavors. The ability to easily access different versions of a project through its forks is also essential for technical research and education, enabling developers to more effectively debug issues and learn from different implementations. As such, forks have enabled the development of some of the most successful software projects today.

In general, forks provide an invaluable tool in software engineering allowing developers to collaborate on new features while maintaining the integrity of existing codebases. They allow users to maintain older versions or experiment freely without affecting the original project, as well as fostering collaboration and growth within open source communities. Forks thus continue to play a vital role in the development of software today.

Simplified Example

A software fork is like making a copy of a recipe. Imagine you have a recipe for making a cake, and you want to make a few changes to it to make it your own. So, you make a copy of the recipe and change the ingredients or the instructions to suit your taste. Similarly, a software fork is when a group of developers take a copy of an existing software's source code and make changes to it, to create a new version of the software with different features or goals. It's like making a copy of a recipe and changing it to suit your taste.

History of the Term "Fork (Software)"

The origins of the term "fork" can be traced back to the early days of computing when programmers physically duplicated and modified code from a shared source. This practice underwent formalization with the introduction of version control systems, enabling developers to monitor code changes systematically and facilitate the creation of different software versions.


Bitcoin Cash (BCH) - A fork of Bitcoin that was created in 2017. The fork was created due to disagreements among the Bitcoin community over the best way to scale the network. Bitcoin Cash increased the block size from 1 MB to 8 MB, which was intended to increase the transaction speed.

Ethereum Classic (ETC) - A fork of Ethereum that was created in 2016. The fork was created in response to the DAO hack, which resulted in the theft of millions of dollars worth of ether. The Ethereum community was divided over whether to reverse the transactions that had been made as part of the hack, and the fork was created as a result of this disagreement.

Litecoin (LTC) - A fork of Bitcoin that was created in 2011. Litecoin was created by Charlie Lee, who was a former Google engineer. Litecoin was created to address some of the perceived limitations of Bitcoin, such as slow transaction times and high fees. Litecoin is often seen as a faster and more efficient version of Bitcoin, and it has a strong community of supporters.

  • Programmability: The ability of a technology, system, or device to be controlled and automated through the use of software programs and code.

  • Quantum Computing: A rapidly emerging technology and has the potential to revolutionize many industries.