Ask HN: What do you or your company use to organize documents?

At my company, we are still using a shared disk in Windows and we load everything there, somewhat divided into folders that are supposedly related.

This is not a good solution: as soon as you have a decent number of documents it's very confusing and complicated to search documents. Plus, you can't label documents (which would make the search way easier), you can't track who loaded, you can't track versions etc.

What do you guys use?