The correct answer is D. numerical controlled machines.
APT (Automatically Programmed Tools) is a programming language used to control machine tools. It was developed in the 1950s by the United States Air Force and MIT. APT is a high-level language that allows programmers to specify the geometry of a part and the machining operations required to produce it. APT programs are then translated into machine code that can be executed by a numerical control (NC) machine.
NC machines are used to manufacture a wide variety of products, including parts for automobiles, aircraft, and medical devices. APT is the most widely used programming language for NC machines.
A. Large automation systems are not typically programmed using APT. Instead, they are typically programmed using a different type of language, such as PLC (programmable logic controller) code.
B. Drafting systems are used to create drawings of parts and products. They are not typically used to program NC machines.
C. Programmable controllers are used to control industrial processes. They are not typically used to program NC machines.
E. None of the above is the correct answer.