What is the purpose of the numbers listed in a class name? For example ENG 302, MCT 752, BIO 502
There are also some with extra letters - ARA 602S, ENG 614P

Can someone explain what they mean?
(Please leave actual answers and no links, I will report)

Robots with telescoping arms are sometimes used to perform tasks (e.g., welding or placing screws) where access may be difficult for other robotic types. during a test run, a robot arm is programmed to extend according to the relationship r = 3 + 0.5cos(4θ) and the arm rotates according to the relationship θ=−π4t2+πt , where r is in feet, θ is in radians, and t is in seconds. use a computer program to plot the path of tip a in x and y coordinates for 0 ≤ t ≤ 4s.

By refraining from constructing a building until they are certain that it will not cause harm to the environment, an organization is adhering to the

Which is a false statement considering copyright law? a. when people upload something to the internet they automatically receive a copyright for the work b. the work does not have to contain a copyright notice to be considered having a copyright c. copyright is legal term describing rights given to the creators for literary and artistic works d. personal pictures are always covered by copyrights