title: Christoph Gohlke Naming Convention for Unofficial Windows Binaries for Python Extension Packages
body: <p>What is the naming convention used for the Python wheels at 
  <a href="http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy">Christoph Gohlke's Unofficial Windows Binaries for Python Extension Packages</a>?</p>
  
  <p>For example, for scipy here are two of names of wheels on the page:</p>
  
  <p>scipy-0.17.0-cp27-none-win32.whl</p>
  
  <p>scipy-0.17.0-cp27-none-win_amd64.whl</p>
  
  <p>What does 'none' indicate?</p>
  
  <p>What's the difference between win32 and win_amd64?</p>
  
  <p>Does it matter if I'm using the x86 or x86-64 version of Python (ref <a href="https://www.python.org/downloads/release/python-2711/">Python 2.7.11</a>)?</p>