资料来源 : pyDict

very low frequency的简写

资料来源 : Free On-Line Dictionary of Computing

VIF
     
        VHDL Interface Format.  Intermediate language used by the
        Vantage VHDL compiler.  "A VHDL Compiler Based on Attribute
        Grammar Methodology", R. Farrow et al, SIGPLAN NOtices
        24(7):120-130 (Jul 1989).