A program that places programs into main memory and prepares them for execution-
A program that places programs into main memory and prepares them for execution is loader.
A loader is the part of an operating system that is responsible for loading programs and libraries.
Main Memory refers to a physical memory that is the internal memory to the computer. The word main is used to distinguish it from external mass storage devices such as disk drives. Main memory is also known as RAM. The computer is able to change only data that is in main memory.