Gedcom is a file format developed by the LDS church which enables the
exchange of information between different genealogy programs. Gedcom files
are merely TEXT files formatted in a special way, so they can easily be
exchanged cross-platform between Mac and PC users.
GEDCOM is the acronym for "GEnealogical Data COMmunications." This computer
data format was created by The Church of Jesus Christ of Latter-day Saints.