In a recent note, Charles Mills said:

> Date:         Sat, 18 Nov 2006 17:39:22 -0800
> 
> You could do some of that with labeled USINGs.
> 
But only some.  It requires the programmer to explicitly qualify
each symbol use

I recall vaguely that the 709 (et. al.) assembler, FAP, had
an operation called HED that did something like that.
> 
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
> Of Gerhard Postpischil
> Sent: Saturday, November 18, 2006 5:35 PM
> 
> If John E. is lurking, there is one feature I'd really love to
> see - qualifiers. Suppose you wish to combine two programs that
> have duplicate variables - prefix each code section with a
> qualifying name, and the assembler correctly resolves the local
> references. In a way this was a precursor to the way unexposed

-- gil
-- 
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