4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Controller  \Con*trol"ler\,  n. 
  1.  (Elec.)  Any  electric  device  for  controlling  a  circuit  or 
  system;  specif.: 
  a  An  electromagnet,  excited  by  the  main  current,  for 
  throwing  a  regulator  magnet  into  or  out  of  circuit  in 
  an  automatic  device  for  constant  current  regulation. 
  b  A  kind  of  multiple  switch  for  gradually  admitting  the 
  current  to  or  shutting  it  off  from  an  electric 
  motor;  as  a  car  controller  for  an  electric  railway 
  car 
 
  2.  (Mach.)  A  lever  controlling  the  speed  of  an  engine;  -- 
  applied  esp.  to  the  lever  governing  a  throttle  valve,  as 
  of  a  steam  or  gasoline  engine,  esp.  on  an  automobile. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Controller  \Con*trol"ler\,  n.  [From  control,  v.  t.:  cf  F. 
  contr[^o]leur.] 
  1.  One  who  or  that  which  controls  or  restraines;  one  who 
  has  power  or  authority  to  regulate  or  control;  one  who 
  governs. 
 
  The  great  controller  of  our  fate  Deigned  to  be  man, 
  and  lived  in  low  estate.  --Dryden. 
 
  2.  An  officer  appointed  to  keep  a  counter  register  of 
  accounts,  or  to  examine,  rectify,  or  verify  accounts. 
  [More  commonly  written  {controller}.] 
 
  3.  (Naut.)  An  iron  block,  usually  bolted  to  a  ship's  deck, 
  for  controlling  the  running  out  of  a  chain  cable.  The 
  links  of  the  cable  tend  to  drop  into  hollows  in  the  block, 
  and  thus  hold  fast  until  disengaged. 
 
  From  WordNet  r  1.6  [wn]: 
 
  controller 
  n  1:  someone  who  maintains  and  audits  business  accounts  [syn:  {accountant}, 
  {comptroller}] 
  2:  a  mechanism  that  controls  the  operation  of  a  machine;  "the 
  speed  control  on  his  turntable  was  not  working  properly"; 
  "I  turned  the  controls  over  to  her"  [syn:  {control}] 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  controller 
 
    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) 
 
 

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