The E perimental omputing acility format is used by the GIMP to store image files.

The XCF file format is the native image format of the GIMP image-editing program. It supports saving each layer, the current selection, channels, transparency, paths and guides. However, like the PSD file, the undo history is not saved in an XCF file.

Cross System (coupling) Facility. Software, introduced in MVS/ESA SP4, which allows programs to communicate channel-to-channel, peer-to-peer, across a sysplex – i.e., it’s the basic sysplex-enabling bit of z/OS. XCF supports program communication, and sends program status and signal information between z/OS system images in a sysplex.

See cross-system coupling facility.