Operating systems theory 2026-02-16T19:25:36+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Coffman, E. G. (Edward Grady), 1934-; Denning, Peter J. (Prentice-Hall series in automatic computation, 1973)