Memory swapping is a memory reclamation method wherein memory contents not currently in use are swapped to a disk to make the memory available for other applications or processes. The exact state or "page" of memory is copied to the disk to make the data contiguous and easy to restore later.
A cabinet file (CAB) is a compression file format used by Microsoft installation engines. Many installers use CAB for file compression using a broad range of file headers. Its file extension is .cab.
The CAB file format enables single file compression of multiple files, which facilitates installer package creation. CAB and ZIP archives are similar because each format compresses multiple files into a single file container. A cabinet icon represents ZIP files.
CAB holds multiple files and includes reserved file header space for digital signatures or other data. CAB often attaches to self-extracting programs or installers. Microsoft CAB File (MSCF) markers provide simple identification. MSCF and InstallShield are incompatible file types.
CAB enables the following three different compression formats:
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