Prototype
A "prototype" refers to an initial, often functional, working model of a product, system, or design, used for testing and feedback before full-scale production. It can also mean a standard or typical example of something, or a character in a 2009 open-world video game where the player controls a shapeshifting protagonist.
Via: Elon Musk: — If you are going to create a Company — The first thing you should do is create a working prototype. https://x.com/0xmitsurii/status/1963150429052870845