Crossword clues for Systems. 5 letters:SERVOControl system, for shortTSLOTPart of a bandsaw's support systemCREDOSystem of beliefsDENEBStar whose solar system Silver Surfer hails from, in the Marvel UniverseDRONEBit of modern technology banned from general use in the US National Park systemGAMMAKind of wave that's the highest-frequency wave the human neural system producesOCTALLike the number system used by the Na'vi, in "Avatar"TCELLImmune system fighterDCUPSSupport systems for some headlightsTCELLImmune system lymphocyteTAEBOMartial arts-based exercise systemSONARSub systemLINACMachine in the Large Hadron Collider systemTCELLImmune system elementRADARWeather systemULCERDigestive-system maladyOCTALNumeric system in which 7 is the highest digitLORANEarly seagoing wayfinding systemCODESSystems of rulesARMEDLike active security systemsATARIMaker of the Lynx and Jaguar systemsGREEKType of campus systemNOKIAIts phones ran on the Symbian operating systemHELMSSteering systems at seaSONARUnderwater detection systemAORTACirculatory system partDCUPSRack's support systemsLORANNavigation systemMARTAAtlanta's public transit systemTAEBOWorkout system involving martial artsTAEBOVigorous exercise systemATARIVideo game system referenced in a "Stranger Things" episodeCREDOA system of beliefAEGISMythologically-named U.S. ballistic missile defense systemGLYPHSymbol in an old writing systemLORANLong-range navigational systemETHICMoral systemTCELLImmune-system first responderETHOSBasic belief systemXYLEMPart of a plant systemTCELLImmune system memberZAXISLine in a 3-D systemISAACShorthand-system inventor PitmanUBAHNVienna subway systemHATHASystem of yogaPENALRelated to the criminal-justice systemPOLLYWith 36 Across, "woman" whose speech criticizing the colonial judicial system was reprinted in several newspapers (1747)BARDSMetric system users?ITSINCall that may be confirmed by the Hawk-Eye systemISAACFirst name of an author with works in nine of the ten Dewey Decimal System categories