term% ls -F
term% cat index.txt
                      Preface to the Third (2000) Edition

   A great deal has happened to Plan 9 in the five years since its last
   release. Although much of the system will seem familiar, hardly any aspect
   of it is unchanged. The kernel has been heavily reworked; the graphical
   environment completely rewritten; many commands added, deleted, or
   replaced; and the libraries greatly expanded. Underneath, though, the same
   approach to computing remains: a distributed system that uses file-like
   naming to access and control resources both local and remote.

   Some of the changes are sweeping:

           Alef is gone, a casualty of the cost of maintaining multiple
           languages, compilers, and libraries in a diverse world, but its
           model for processes, tasks, and communication lives on in a new
           thread library for C.

           Support for color displays is much more general, building on a new
           alpha-blending graphical operator called draw that replaces the
           old bitblt. Plan 9 screens are now, discreetly, colorful.

           A new mechanism called plumbing connects applications together in
           a variety of ways, most obviously in the support of multimedia.

           The interfaces to the panoply of rotating storage devices have
           been unified and extended, while providing better support for
           having Plan 9 coexist with other operating systems on a single

           Perhaps most important, this release of the system is being done
           under an open source agreement, providing cost-free source-level
           access to the software.

   Plan 9 continues to be the work of many people. Besides those mentioned in
   the old preface, these people deserve particular note: Russ Cox did much
   of the work updating the graphics and creating the new disk and bootstrap
   model as well as providing a number of new commands; David Hogan ported
   Plan 9 to the Dec Alpha; and Sape Mullender wrote the new thread library.

   Other new contributors include Bruce Ellis, Charles Forsyth, Eric Van
   Hensbergen, and Tad Hunt.

                                                     Bell Labs
                                                     Computing Science
                                                     Research Center
                                                     Murray Hill NJ
                                                     June, 2000

                                                     Copyright (c) 2000
                                                     Lucent Technologies Inc.
                                                     All rights reserved.