Do the ink cartridges in the HP OfficeJet Pro 6960 store any information about my usage?

Yes, HP cartridges used with this printer contain a memory chip that assists in the operation of the printer and stores a limited set of anonymous information about the usage of the printer. This information might be used to improve future HP printers, and more details can be found in the user guide at www.hp.com/support/ojp6960. (Page 2)