From: tkoenig@netcologne.de   
      
   Lawrence D'Oliveiro  schrieb:   
   > Here’s another bit of terminology the Fortran spec seemed to feel the need   
   > to invent for itself: talking about “images” to refer to running   
   instances   
   > of a program. I figured this either meant “thread” or “process”,   
      
   The term is independent of the implementation.  Coarrays can be   
   implemented in a multitude of ways, including threads, processes   
   or MPI wachamacallits.   
      
   And that is the whole point:  Implemenations are free to implement   
   any way they want.  Talkling about "threads" on a 1000-node,   
   24000-core would not make a lot of sense, for example.   
      
   >but a   
   > clue appears in the 2018 spec, section 11.4, “STOP and ERROR STOP   
   > statements”:   
   >   
   >     When an image is terminated by a STOP or ERROR STOP statement, its   
   >     stop code, if any, is made available in a processor-dependent   
   >     manner. If the stop-code is an integer, it is recommended that the   
   >     value be used as the process exit status, if the processor   
   >     supports that concept.   
   >   
   > So an image “terminates”, and returns a process “exit status”; this   
   must   
   > mean that an “image” is equivalent to a “process”.   
      
   No.   
      
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