There are hardware models, programming language models, and abstract models Programming language paradigms are approaches for organizing source code

A computational model defines what an algorithm or program does. Low-level programming means writing machine code that can be understood by a CPU directly, or something very near to that.

low-level programming language — programming language that operates at a low level of abstraction, meaning that code is similar to machine code. abstract model — technique that derives simpler high-level conceptual models for a computer while exploring the science of what new algorithms can or cannot do. machine code — sequence of binary digits (bits) that can be understood and executed directly by a computer. hardware model — design for a how a specific physical computer executes algorithms.