PURE  
   Portable, Universal Runtime Executive, successor to PEACE. Home site, brief description: strives for very fine granular dynamic reconfiguration, based on passive instead of only active objects. Goal: special purpose OSs with minimal memory use.
   http://ivs.cs.uni-magdeburg.de/bs/forschung/pure-eng.shtml

PURE: Design Rationale of the PURE Object-Oriented Embedded Operating System  
   Project goal: provide a portable, universal runtime executive for deeply embedded parallel distributed systems. Deeply embedded means systems that have extreme resource constraints in memory, CPU, and power use. [ResearchIndex]
   http://citeseer.nj.nec.com/4012.html

PURE Development Page  
   Manuals (HTML, PDF), targets, tests and results, bug reporting, documentation for sources and tools.
   http://ivs.cs.uni-magdeburg.de/~pure/

PURE: On the Development of Object-Oriented Operating Systems for Deeply Embedded Systems  
   Describes aspects of PURE Project, a small object-oriented portable, universal runtime executive (operating system) for deeply embedded parallel/distributed systems. [ResearchIndex]
   http://citeseer.nj.nec.com/203236.html