Poorly. I have a NAS that holds tens of thousands of PDFs. They are organized in folders, one for each letter of the alphabet, by last name of the first author. It begins:

AAAI - Interim report August 2009.pdf
Abbey - Charles Taylor.pdf
Abbott - A note on the nature of water.pdf
Abbott - Fodor and Lepore on Meaning Similarity and Compositionality.pdf
Abbott - Realism, model theory, and linguistic semantics.pdf
Abbott - Water = H2O.pdf
Abbruzzese - On using the multiverse to avoid the paradoxes of time travel.pdf
Abdel-Khalek - Happiness, health, and religiosity, significant relations.pdf