Cerridwen said:
Word and Excel 2000, 2002 (XP) and 2003 can open files created and
saved in any of these versions. If you've used a formatting feature
that is from a newer version, such a diagonal table or cell borders,
and open that file in an older version that does not have that
feature, the new feature will not be displayed and, if you save the
file in the older version, the feature will be lost from the file.
Other than that, Word and Excel share files between versions just
fine.
Access is another matter. The Access file format changed between all
three versions. You must always save the database in the oldest
format.