noun which may take the genitive case particle 'no', noun
new and old; incoming and outgoing
Used to contrast new and old things, or incoming and outgoing items (e.g., students, members, inventory). Often appears as a noun or with の to modify another noun.
Compare new and old technologies.
Both new and old members gathered.
I compared the old and new models.
Regardless of whether it's new or old, good work is always popular.
It's the time when the old and new officers change places.