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 for wheel of reincarnation
From The Jargon File (version 4.4.7, 29 Dec 2003) :

  wheel of reincarnation
  
  
      [coined in a paper by T.H. Myer and I.E. Sutherland On the Design of
      Display Processors, Comm. ACM, Vol. 11, no. 6, June 1968)] Term used to
      refer to a well-known effect whereby function in a computing system family
      is migrated out to special-purpose peripheral hardware for speed, then the
      peripheral evolves toward more computing power as it does its job, then
      somebody notices that it is inefficient to support two asymmetrical
      processors in the architecture and folds the function back into the main
      CPU, at which point the cycle begins again.
  
      Several iterations of this cycle have been observed in graphics-processor
      design, and at least one or two in communications and floating-point
      processors. Also known as the Wheel of Life, the Wheel of Samsara, and
      other variations of the basic Hindu/Buddhist theological idea. See also {
      blitter.
  

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