* RenderMan: A rendering software developed by Pixar, which is used to create photorealistic images from 3D models. It utilizes a language called RenderMan Shading Language (RSL) for controlling lighting, materials, and other visual effects.
* SoftImage 3D: A 3D modeling and animation software used to create and manipulate the characters, sets, and props.
* C++: A powerful general-purpose programming language used for developing various aspects of the software and pipeline.
* Unix: An operating system used to manage the computer systems and software used for the animation.
It's important to note that the specific versions and combinations of these software and languages have evolved over time, and the exact details of Toy Story's development are not publicly available. However, these are the key components that were involved in creating the groundbreaking animation.