Machine language.
Hope this helps
Is there a question or something
To direct the employees and respond to any calls/emails regarding a problem or upgrade that should be changed/fixed. (I don't know if that's what you wanted)
Answer:
The three basic types of control structures are sequential, selection and iteration. They can be combined in any way to solve a specified problem. Sequential is the default control structure, statements are executed line by line in the order in which they appear.