More on Extensible Machines
One of the most salient characteristics of extensible
machines (EM) is the facility for providing 
system control over program-to-program and program-to-data
linkage (e.g., address connection).  It is 
the intent of this paper to expand and clarify the remarks
concerning program-to-program and program-to-data 
linkage that were embodied in the authors' previous
paper on the EM concepts, and to, finally, trace 
the employment of linkage mechanisms through
various levels of programming languages.
CACM March, 1966
Leonard, G. F.
Goodroe, J. R.
