Zero address arithmetic is a feature of a few innovative computer architectures , where the assignment to a physical address is deferred. It Eliminates the link step of conventional compile and link architectures, and more Generally relocation .
All Burroughs large systems and medium systems had this property, as their modern day successors preserve the original physical architecture.
The 1960 announcement of the English Electric KDF9 is the first announcement of a zero-address instruction format computer, quickly followed by the Burroughs B5000 . 
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