Memory abstraction using RAM and secondary storage.

Background process providing system services.

Software controlling communication with hardware devices.

Package format and management technology used by several Linux distributions.

Moving fixed-size memory pages between RAM and storage.

Software controlling background system services.

Software layer hiding hardware-specific details from the OS.

Package-management utility traditionally used by RPM-based systems.

Fixed-size unit of virtual memory.

Central configuration database used by some operating systems.