VIRTUAL WORK SPACES.

Many programs need a facility for extending their addressability beyond those restrictions imposed by the hardware on which they run. Virtual memory requires special hardware features not always provided. The ideas discussed extend the addressability of programs in a limited hardware base. Also, virtual work spaces facilitate the writing of reentrant programs. A reentrant program must be refreshable from its library at every point where storage may be taken away from it. Providing a means to separate variable data from executable code eases the programmer's job of writing reentrant code. The functions facilitate sharing data between programs running within the same process or programs running in asynchronous, concurrent processes.