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controller

 [kuhn-troh-ler]   Origin

con·trol·ler

   [kuhn-troh-ler]
noun
1.
an employee, often an officer, of a business firm who checks expenditures, finances, etc.; comptroller.
2.
a person who regulates, directs, or restrains.
3.
British Aeronautics. a dispatcher.
4.
a regulating mechanism; governor.
5.
Also called control unit, processor. Computers. the key component of a peripheral device, as a terminal, printer, or external storage unit, that contains the circuitry necessary to interpret and execute instructions fed into the device.
Origin:
1350–1400; Middle English countrollour < Anglo-French countrero(u)llour, Middle French contrerolleur, equivalent to contrerolle duplicate roll (see control) + -eur, -our < Latin -ōr- -or2 or -ātōr- -ator

Related forms
con·trol·ler·ship, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Controller is always a great word to know.
So is complicity. Does it mean:
something that fills up or completes
involved with others in wrongdoing
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Collins
World English Dictionary
controller (kənˈtrəʊlə)
 
—n
1.  a person who directs, regulates, or restrains
2.  Also called: comptroller a business executive or government officer who is responsible for financial planning, control, etc
3.  the equipment concerned with controlling the operation of an electrical device
 
con'trollership
 
—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

controller
mid-15c., from Anglo-Fr. contrerolleour (late 13c.), O.Fr. contrerelleor, from M.L. contrarotulator, agent noun from *contra-rotulare (see control). Mechanical sense is from 1867.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

controller definition

hardware
Part of a computer, typically a separate circuit board, which allows the computer to use certain kinds of peripheral devices. A disk controller is used to connect hard disks and floppy disks, a network controller is used for Ethernet. Other controllers are: keyboard controller, interrupt controller and graphics controller.
(1998-03-16)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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