Operating system concepts 2026-02-15T21:02:57+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Silberschatz, Abraham; Gagne, Greg; Galvin, Peter B. (Wiley, 2014)