n. One of the two parts of a file recognized by the Mac OS. A Macintosh file has a data fork and a resource fork. Most or all of a typical user-produced document is in the data fork; the resource fork usually contains application-oriented information, such as fonts, dialog boxes, and menus. See also data fork, resource fork.vb. To initiate a child process in a multitasking system after a parent process has been started. See also multitasking.