What does PSX/TAS mean?

Typically in speedruns, I see in the title PSX and/or TAS, like a Metal Gear Solid 1 speedrun. What does both PSX and TAS mean?
Best Answer
PSX is an abbreviation for the first Playstation. (Note that PSOne is something entirely different).
TAS stands for "Tool-Assisted Speedrun".
So together, PSX / TAS means a Tool-Assisted Speedrun of the Playstation version of Metal Gear Solid 1.
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What does TAS mean in gaming?
A tool-assisted speedrun, or tool-assisted superplay (TAS), is generally defined as speedrunning an emulated game. During development of the speedrun, the framerate is slowed down to allow precise inputs to be done with ease.How do you do a TAS speedrun?
Make a Tool Assisted Speedrun/Superplay [TAS] (Dolphin)What is TAS bot?
TASBot is a tool-assisted speedrun robot created in 2014, developed by a team led by dwangoAC. The robot takes a list of controller inputs which it then sends to a console such as a Nintendo Entertainment System or Super Nintendo Entertainment System (SNES) directly via signals to the controller ports.Who invented PSX?
PlayStation was the brainchild of Ken Kutaragi, a Sony executive who managed one of the company's hardware engineering divisions and was later dubbed "The Father of the PlayStation".Introduction to TAS: Tool-Assisted Speedrunning (What, How, Why?)
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Answer 2
The term PSX is mainly used to refer to the first Sony PlayStation console. The abbreviation PSX is said to stand for PlayStation Experimental, which was the code name used during the console's development.
Delving more deeply into its history, it is said that PSX was to be a collaboration between Nintendo and Sony to create a CD-disk add-on for the Super Nintendo. This never came to fruition, and the concept for PSX became a new console all together. However, I have not taken the time to verify this as fact.
However! the term PSX is often used falsely for the original PlayStation; in fact, there is an actual device called the PlayStation X (wiki-link below). This was a Japan-only release of a PlayStation 2 with built-in video recorder. It sold rather poorly, and never made it to the west.
A TAS is a tool assisted "speedrun". Meaning, this is a play-through of a video game, intended to complete it as fast as possible. Tool assisted refers to the possible emulation of the game, or use of slow-motion recording. Emulation glitches and/or exploits are allowed in these play-through sessions as well, which would not be possible in unassisted speedruns.
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Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Ann H, Brett Jordan, Pixabay, Jim Fawns