Burroughs Corporation. The Descriptor---a Definition of the B5000 Information Processing System., 1961. http:// www.cs.virginia.edu/brochure/images/ manuals/b5000/descrip/descrip.html.  Home/Search   Document Not in Database   Summary   Related Articles

....must provide protection among different user processes and between all user processes and trusted supervisor code. In addition, operating systems should support flexible sharing of data to allow applications to co operate efficiently. The implementors of early architectures and operating systems [5, 26] believed the most natural solution to the protected sharing problem was to place each allocated region in a segment, which has the protection information. Although this provides fine grain permission control and flexible memory sharing, it is difficult to implement efficiently and is cumbersome ....

Burroughs Corporation. The Descriptor---a Definition of the B5000 Information Processing System., 1961. http:// www.cs.virginia.edu/brochure/images/ manuals/b5000/descrip/descrip.html.

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