Compiler :  A system software program which translates the highlevel language program into a SUITABLE machine language program.

TEXT editor: Another important system program that all programmers use is a text editor. It is USED for entering and editing application programs. The user of this program interactively execute COMMANDS that allow statements of a source program entered at a KEYBOARD to be accumulated in a file.

Operating system (OS) : It is a key system software component. This is a large program, or actually a collection of routines , that is used to control the sharing of and interaction among various computer units as they execute application programs. The OS routines perform the tasks required to assign computer resources to individual application programs. These tasks include assigning memory to program and data files, moving data between memory and disk units, and handling I/O operations. 

Compiler :  A system software program which translates the highlevel language program into a suitable machine language program.

Text editor: Another important system program that all programmers use is a text editor. It is used for entering and editing application programs. The user of this program interactively execute commands that allow statements of a source program entered at a keyboard to be accumulated in a file.

Operating system (OS) : It is a key system software component. This is a large program, or actually a collection of routines , that is used to control the sharing of and interaction among various computer units as they execute application programs. The OS routines perform the tasks required to assign computer resources to individual application programs. These tasks include assigning memory to program and data files, moving data between memory and disk units, and handling I/O operations.