[TUHS] Plot 10 Sources

[Nelson H. F. Beebe]

Clem Cole <clemc at ccc.com> asks on Tue, 9 Jul 2019 21:32:31 -0400:

>> does anyone know if any version of the Tektronix Plot 10 sources has survived? 

In our PDP-10 TOPS-20 archive of what was then utah-science, later
science.utah.edu (a domain now owned by our Dean's office), I find
these files:

    % ls -log
    total 3768
    -rw-rw-r-- 1  145899 May 16  1985 agii.for
    -rw-rw-r-- 1  245190 May 16  1985 ezgr27.for
    -rw-rw-r-- 1 2132822 May 16  1985 igl.for
    -rw-rw-r-- 1  289730 May 16  1985 p4663.for
    -rw-rw-r-- 1  129276 May 16  1985 p4663.ver
    -rw-rw-r-- 1  149038 May 16  1985 ploter.for
    -rw-rw-r-- 1  210033 May 16  1985 plt10.for
    -rw-rw-r-- 1     470 May 16  1985 plt10t.for

    % wc -l *
       1815 agii.for
       7251 ezgr27.for
      26011 igl.for
       3577 p4663.for
       1596 p4663.ver
       1845 ploter.for
       2763 plt10.for
	 27 plt10t.for
      44885 total

    % head -16 agii.for
    C***********************************************************************00000010
    C*                                                                     *00000020
    C*                4010A02 PLOT 10 ADVANCED GRAPHING II                 *00000030
    C*                                LEVEL 1                              *00000040
    C*                                                                     *00000050
    C*         062-2948-01 STD. SOURCE CARD DECK, 026 PUNCH                *00000060
    C*         062-2949-01 STD. SOURCE LISTING                             *00000070
    C*                                                                     *00000080
    C*            C  COPYRIGHT 1976 TEKTRONIX, INC.                        *00000090
    C*               ALL RIGHTS RESERVED                                   *00000100
    C*                                                                     *00000110
    C*               TEKTRONIX, INC.                                       *00000120
    C*               P. O. BOX 500                                         *00000130
    C*               BEAVERTON, OREGON 97077                               *00000140
    C*                                                                     *00000150
    C***********************************************************************00000160

The Bitsavers code at

    http://www.bitsavers.org/bits/Tektronix/PLOT_10/TCS_3.0/plot10.ftn

has a 1974 copyright date, so our code is two years newer.

The question is, what is the copyright status of this code?  Has
Tektronix (https://www.tek.com/) made any statements about releasing
it to the public?

I no longer remember the conditions under which we got the PLOT 10
code, and any licensing paperwork has long since gone to recycling.

-------------------------------------------------------------------------------
- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: beebe at math.utah.edu  -
- 155 S 1400 E RM 233                       beebe at acm.org  beebe at computer.org -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe/ -
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