Glossary of Terms

Operating Systems

Keyword Definition
Boot Loader A program that loads the operating system kernel into memory and begins its execution.
Command Line Interface An interface that allows a user to interact with an operating system or program by typing commands into a terminal or console.
Deadlock A situation in which two or more processes are unable to proceed because each is waiting for another to release a resource.
Device Driver A software component that allows an operating system to communicate with and control a specific hardware device.
Disk Defragmentation A process that reorganizes the files on a disk to optimize their placement and improve access times.
Encryption The process of encoding data to make it secure and prevent unauthorized access or modification.
File Allocation Table (FAT) A file system used by some operating systems to manage the storage of files on a disk.
File Compression The process of reducing the size of a file by encoding its contents using an algorithm that removes redundancy.
File System The method used by an operating system to organize and manage the storage of files on a disk.
Graphical User Interface An interface that allows a user to interact with an operating system or program using graphical elements such as windows, icons, and menus.
Interrupt A signal sent to the processor by a device or program to request the processor's attention.
Kernel The core component of an operating system that manages the system's resources and provides basic services for other programs.
Multi-Tasking The ability of an operating system to run multiple programs or tasks concurrently.
Multi-User The ability of an operating system to allow multiple users to use the same computer simultaneously.
Operating System A software that acts as an interface between user applications and the computer's hardware.
Process An instance of a program in execution, including its current state and resources.
System Call A request made by a program for a service or resource provided by an operating system's kernel.
System Tray A feature of a graphical user interface that displays icons for system-related notifications and services.
Thread A segment of a sequence that can run independently and simultaneously with other segments within the same process.
Virtual Memory A technique used by an operating system to extend the amount of usable memory by temporarily transferring data from RAM to a disk.