1. Models: Things created from geometric primitives—points, lines, and triangles, specified by vertices.
2. Rendering: The process by which a computer goes from a model to creating an image.
3. Pixel: The smallest visible element on the display device. Pixels in the system are stored in the frame buffer, which is a memory space managed by the graphics hardware and used to feed the display device.
4. Shaders: A program written for GPU that runs on graphics hardware.