1914-1918 1939-1945 20thcentury adventure adventureandadventurers aeronautics airplanes american americansignlanguage armedforces armoredvehicles artificialintelligence automaticcontrol automobileindustryandtrade automobiles automobilia automotive biomimicry boardgames caillou(fictitiouscharacter) campaigns children'sfiction children'sfilms civilwar(spain:1936-1939) collectibletoys computers computerscience computervision consciousautomata cosmology costs crafts defensecontracts defenseindustries designandconstruction detroit drama droneaircraft equipmentandsupplies evaluation fiction forecasting games general george(fictitiouscharacter:hawking) german germany greatbritain hackers history hobbies hummertruck imageprocessingandcomputervision intelligentcontrolsystems jeepautomobile jokes juvenile juvenilefiction juvenilefilms juvenilehumor juvenileliterature m1(tank) maintenanceandrepair manufacturingindustries matchinggames michigan military militaryparticipation militaryplanning militarytrucks militaryweapons miscellaneous models motorvehicles ocean opticalpatternrecognition othervehicles participation patternperception patternrecognitionsystems personalrapidtransit pictorialworks pigeons police pop-upbooks railroadtrains remotelypiloted remotelypilotedvehicles research riddles roads sciencefiction seastories ships skating snow soundeffectsbooks spaceflight spies steamautomobiles storiesinrhyme toyandmovablebooks toymaking transportation transportationcollectibles transportationengineering trucks unitedstates vocabulary volkswagenautomobiles volkswagentrucks warships wheels winter witandhumor woodworking worldwar zebras zoology