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From: mario@cs.man.ac.uk (Mario Wolczko)
Newsgroups: comp.lang.smalltalk
Subject: Re: Reference to PIE (early extension to Smalltalk environment)
Message-ID: <1928@m1.cs.man.ac.uk>
Date: 20 Nov 90 12:42:41 GMT
References: <1990Nov19.203102.1167@computing-maths.cardiff.ac.uk>
Sender: news@cs.man.ac.uk
Reply-To: mario@cs.man.ac.uk (Mario Wolczko)
Organization: University of Manchester
Lines: 27

In article <1990Nov19.203102.1167@computing-maths.cardiff.ac.uk>,
andrew@computing-maths.cardiff.ac.uk ("f dlj" gets my name) writes:
> I have just come across a reference to PIE (Personal Information
Environment),
> an extension of the Smalltalk programming environment where
> Smalltalk classes are represented by layered networks. The reference is:
> 
> Goldstein, I.P. and Bobrow, D.G.
> A layered apporach to software design
> Report CSL-80-5, Xerox, 1980
> 
This might be easier to obtain:
	A layered approach to software design,
	I. P. Goldstein and D. G. Bobrow,
	in "Interactive Programming Environments", edited by D. R.
	Barstow, H. E. Shrobe and E. Sandewall, McGraw-Hill, 1984,
	pp387-413, 0-07-003885-6.
It's actually an excellent book in its own right, collecting together
many important papers.

Mario Wolczko

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