> Which then influenced Mesa, Cedar

In what respect? What sources for this claim do you have?

The Xerox papers on digital archive, I can try to hunt them down, see for example the one on XDE Tajo experience for Mesa.

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Rochus 2 hours ago | parent [-]

MPS/MPL began in 1971; the Mesa name was adopted in June 1974; an Alto cross-compiler worked in spring 1975. Cedar is both a language (an extension of Mesa, e.g. by a GC, but the OO features proposed by Lampson were never implemented to my knowledge) and a development environment. I assume your claim is about the latter. The programming language doesn't have anything in common with Smalltalk, and the fundamental work even predated the latter.

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pjmlp an hour ago | parent [-]

Yes my claim is about the IDE experience shared across all Xerox PARC environments, and how it affected the design of each language individually.

I will hunt down the papers.

	▲	Rochus an hour ago \| parent [-]
		We should not forget that the original Alto operating system(s) had a GUI already and was the basis of well known applications like Bravo or Gypsy; the original OS and the said applications were implemente in BCPL; and all were operational before Smalltalk-76. By Wirth's first PARC visit in 1976–77, Mesa had already become a self-hosting systems-development tool (small operating system and symbolic debugger); I'm not aware of any substantial Smalltalk influence at that time.