copyright & public domain

[bright@ENH.NIST.GOV]

How does one copyright code (for contribution)?  Is it really necessary?  I
work for the government, and so cannot copyright research papers, for
example.

How do you make applications for Public Domain use?  Will disabling the
compiler do?  What fees does Apple require?

Thank you
--Dave
David S. Bright                        bright@enh.nist.gov  
Microanalysis Research Group                                   
National Institute of Standards & Technology (NIST, formerly NBS)
Gaithersburg, MD 20899                                           
USA
301-975-3911