Emulation is the process of imitating the functions of one system using another system. This is commonly seen in computing, where software called an emulator allows a computer to run programs designed for a different operating system or hardware. For example, a video game emulator can enable a modern computer to play games originally made for older consoles. Emulation serves various purposes, including preserving software and enabling cross-platform compatibility. It allows users to experience applications or games that may no longer be available on current systems. Additionally, emulation can be used for testing and development, providing a safe environment to run and analyze software without affecting the original system.