UNIX is a general-purpose, multi-user, interactive operating system for the Digital Equipment Corporation PDP-11/40 and 11/45 computers. It offers a number of features seldom found even in larger operating systems, including: (1) a hierarchical file system incorporating demountable volumes; (2) compatible file, device, and inter-process I/O; (3) the ability to initiate asynchronous processes; (4) system command language selectable on a per-user basis; and (5) over 100 subsystems including a dozen languages. This paper discusses the nature and implementation of the file system and of the user command interface.

This is such a beautiful piece of computer science exposition. Man, it’s no wonder everyone wanted to copy these two guys.

see: https://people.eecs.berkeley.edu/~brewer/cs262/unix.pdf see: https://mit.edu/6.1800/www/readings/02-unix.shtml

Web review of Ervin

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CAD software for GNU/Linux

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a general review of the usability and general functionality strides recently made by GNOME