1, TAS (Chinese name "TAS"), also known as "tool-assisted operation technology". It refers to the technology of using a simulator on a computer with auxiliary functions to realize unconventional game operation without changing the rules of the game (such as program code and memory state) at all. This technology and its derivative works are collectively called TAS.

2.TAS originated from 1999 and was born in the early days of doomsday operation. AndyKempling modified the source code of Doomsday Warrior, which made the game run slowly and recorded the operation process, thus giving birth to the first demonstration video with TAS nature.