The term for software that simulates computer hardware is known as emulator. An emulator allows one system to mimic another by replicating its hardware functionality, enabling software designed for one system to run on a different platform. This is particularly beneficial for developers who want to test applications across various environments without needing physical hardware for each. Emulators are frequently used in gaming, software development, and mobile applications, enhancing compatibility and providing users access to legacy systems or applications that would otherwise be inaccessible.