E.g. the C , C++ , or MISC@1 standards define different Programmer Visible Macroarchitecture - although in practice the C microarchitecture for a particular computer includes UISA -LRB- Microcode Instruction Set Architecture -RRB- - a family of machines with different hardware level microarchitectures may share a common microcode architecture , and hence a UISA .

UISA -LRB- MISC@2 -RRB- : A family of machines with different hardware level microarchitectures may share a common microcode architecture , and hence called a UISA .
