PASCAL

[Larry DeLuca]

> 
> My goodness.  Tell me some good things about Unix.  First there was single
> user Unix.  Then multi-user.  Then System III.  Then Version 6.  Then Level 7.
> Then Berkeley.  Then System V.  Then Berkeley 4.x.  Now those silly people
> at Bell Labs are talking about System 8!
> 
> That must mean that Unix is a bad operating system, don't you think?
> 
> 
> -- 
>       Dan Frank
> 
> 	"good news is just life's way of keeping you off balance."


Not exactly...Unix was conceived virtually from the start as a multi-user
operating system...

the first implementations were written in Assembly language on the PDP-7...

a rewrite in C followed and the stuff moved up to a PDP-11...

The most recent tree is like this:

			Version 6

			   |
			   
			PWB Unix (Programmer's Workbench)

			   |

			Version 7

		(Here comes the split between ATT and Berzerkely)

		+------------------------------+
	      (Bell)                        (Berkeley)

		|  				|

		System III		    UNIX 32/V  

		|				|

					    2 and 3 BSD (2 for PDP-11,
						3 for VAX)

		Still System III	       |

		|			  4.0BSD, followed by 4.1BSD
					 and 4.2BSD...sometime after
					the release of 4.0BSD 2.8BSD
					was released, similarly for
					4.1BSD and 2.9BSD, and support
					for PDP-11's was dropped by
					Berzerkeley before the release
					of 4.2BSD for the VAX (which
					is now available for many
					machines).

		|

		System V, R1 for the VAX

		|

		System V, R2 for the VAX and ATT Computers

(i may have some release dates confused, but i believe this to be 
basically correct...)...

					larry...


-- 
uucp:  ..mit-eddie!cybvax0!cci-bdc!larry

arpa:  henrik at mit-mc.ARPA

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