The file below contains a self-paced tutorial (with self-assessment)
on Symmetry in Point groups and Lattices as applied to crystallography.
If you create a directory called \symmetry on a PC running MS-Windows, and 
load sym.exe into there, then when it is run, it unpacks to create an 
executable together with the README file shown below, plus a vbrun300.dll and
a couple of .dat files.

This package is for free distribution to the academic community subject 
to the conditions set out below.
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                             README

This package is the intellectual property of Birkbeck College.
Copyright 1995 Birkbeck College, University of London.

It was written by Sami Raza at Birkbeck College during his employment there,
as a self-paced teaching supplement in the subject area of symmetry, as
applied to Crystallography.   It can only be used on a PC-compatible computer
running Microsoft Windows 3.1 or above.

This package is intended for free distribution to the global academic 
community for teaching purposes, and may not be used by any commercial 
or profit-making organisation without the prior express written permission 
of the authorities of Birkbeck College, University of London.   Any such
request should be addressed to :-

The Head of Department,
Crystallography Department,
Birkbeck College,
University of London,
Malet Street,
London WC1E 7HX
United Kingdom
Tel:+44 (0)171 631 6802
Fax:+44 (0)171 631 6803


Your use of this program constitutes acceptance of the terms contained 
herein.   If you are not prepared to accept these conditions, delete the files
NOW.

Whilst every effort has been made to provide a useful and effective teaching
package, which is trouble-free as far as we are aware, no responsibility 
is accepted for any deleterious effects whatsoever consequent on its 
installation and use UNDER ANY CIRCUMSTANCES. 

No technical support is available for any problems concerning this package,
and Birkbeck College is unable to enter into any written or other
queries relating problems or difficulties in its use. 

Free distribution and copying is encouraged ONLY PROVIDED that the original
file remains unmodified, complete, and without any additions or alterations,
AND ALSO that its origin, authorship, and intellectual ownership is made 
explicit.

Further original copies may be downloaded from our Web site at URL

http://www.cryst.bbk.ac.uk/default.html

We are interested to hear praise, comments, criticisms, bug reports, and
suggestions for improvements, to the address above. 

If you found it useful, why not suggest additional such packages in the areas 
of crystallography and/or structural biology.   We hope soon to have a
similar teaching tool for Fourier Transforms, Synthesis, and Analysis.

You may also wish to visit our Web Course on 
The Principles of Protein Structure  -  point your browser at URL

http://www.cryst.bbk.ac.uk/PPS/index.html

Further such courses will follow.