When I send someone an OpenOffice document as an attachment, they cannot open
it. Why not?
This may be because you sent them a file in the OpenOffice file format and
Microsoft Office does not (yet) support this format. Unfortunately most
people only recognize MSOffice files as the only way to exchange files. To
save your document as MSOffice files use the OpenOffice menu "File" => "Save
As..." and, from the lower drop-down box select the version of Word or Excel
you want to save it in. Be aware that older versions of Word does not always
read newer Word documents, but in general the best format to pick is
Word97/2000/XP.