A fictional item, the subject of a fool's errand. / A Ferris wheel or carousel, due to their central location.

Alternative spelling of keycard

plural of key card (alternative spelling of keycards).

A lockpicking tool in the form of a key of the type generally used to open a lock, on which all pins have been cut down to the lowest position, so that striking this key sharply with a hammer while applying turning force at just the right instant after the impact will 'bump' open a lock.

A special modifier key on a typewriter or computer keyboard, typically used to attach a specific diacritic to another character.

Any of certain keys of a computer keyboard that switch between certain states and are represented by LEDs.

A keycard.

(computing) Any of a set of keyboard keys marked with directional arrows, used for navigation through documents and lists etc.

A serial key of a program to be installed from a compact disc.

(computing) A string of characters or equivalent access code that must be input into a program in order to activate it.