Third Party
A third party in computing refers to a company, individual, or entity that is independent of the original manufacturer or developer of a product. In practice, this includes third-party software, which is any program not created by the operating system's developer (e.g., a Microsoft Office app on Windows), and third-party hardware, which includes components like memory or a video card made by a different company than the computer's manufacturer (e.g., adding an Nvidia card to a Dell computer).
Third-party software: Software applications, plugins, or utilities created by a company other than the maker of the operating system. These are created to enhance or add functionality to the system.
Third-party hardware: Physical components or peripherals purchased from a company different from the one that built the computer. Support for these components typically comes from the hardware manufacturer, not the original computer maker.
Third-party services: Companies that provide services but are not affiliated with the primary technology provider. This can also refer to a separate person or entity involved in a business transaction or partnership.