Computer Program
Learn about units of information.
We’ve now gotten acquainted with operating systems. They are responsible for starting and running computer programs. The programs solve the user’s application tasks. For example, a text editor allows users to work with text.
A program is a set of elementary steps, called instructions. The computer performs these steps sequentially. It follows a strict order of actions and copes with complex tasks. Let’s consider how the computer launches and executes a program in detail.
Computer memory
A hard disk stores all the program’s instructions. If the program is relatively small and simple, it fits in a single file. Complex applications, meanwhile, occupy several files.
Let’s suppose that we have a single file program. When we launch it, the OS loads the file into the computer memory, or the random-access memory (RAM). Then, the OS ...