2  definitions  found 
 
  From  Jargon  File  (4.2.3,  23  NOV  2000)  [jargon]: 
 
  ACK  /ak/  interj.  1.  [common;  from  the  ASCII  mnemonic  for 
  0000110]  Acknowledge.  Used  to  register  one's  presence  (compare  mainstream 
  _Yo!_).  An  appropriate  response  to  {ping}  or  {ENQ}.  2.  [from  the 
  comic  strip  "Bloom  County"]  An  exclamation  of  surprised  disgust,  esp.  in 
  "Ack  pffft!"  Semi-humorous.  Generally  this  sense  is  not  spelled  in  caps 
  (ACK)  and  is  distinguished  by  a  following  exclamation  point.  3.  Used  to 
  politely  interrupt  someone  to  tell  them  you  understand  their  point  (see 
  {NAK}).  Thus  for  example,  you  might  cut  off  an  overly  long  explanation 
  with  "Ack.  Ack.  Ack.  I  get  it  now".  4.  An  affirmative.  "Think  we 
  ought  to  ditch  that  damn  NT  server  for  a  Linux  box?"  "ACK!" 
 
  There  is  also  a  usage  "ACK?"  (from  sense  1)  meaning  "Are  you 
  there?",  often  used  in  email  when  earlier  mail  has  produced  no  reply, 
  or  during  a  lull  in  {talk  mode}  to  see  if  the  person  has  gone  away 
  (the  standard  humorous  response  is  of  course  {NAK}  (sense  1),  i.e., 
  "I'm  not  here"). 
 
 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  ACK 
 
  1.    /ak/  The  {mnemonic}  for  the  ACKnowledge 
  character,  {ASCII}  code  6. 
 
  2.    A  message  transmitted  to  indicate  that 
  some  data  has  been  received  correctly.  Typically,  if  the 
  sender  does  not  receive  the  ACK  message  after  some 
  predetermined  time,  or  receives  a  {NAK},  the  original  data 
  will  be  sent  again 
 
  [{Jargon  File}] 
 
  (1997-01-07) 
 
 

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