The X
按字母分类：
extension name file type Classification
NDF SQL Server Secondary Database File database file
NNT Eudora Address Book File database file
NRMLIB Neat Cabinet File database file
NS2 Lotus Notes 2 Database database file
NS3 Lotus Notes 3 Database database file
NS4 Lotus Notes 4 Database database file
NSF Lotus Notes Database database file
NV NewViews Database File database file
NV2 NewViews 2 Database File database file
NWDB Neat Database File database file
NYF myBase Database File database file