Purpose of this document

This document intends to do the following:

• Explain which basis sets are suitable for your problem.
• Describe the changes that have been made to the basis sets in ADF and
  explain why these changes have been made.
  Important: starting from the ADF2002 release the names of the standard basis sets have changed to more intuitive names:
  I→SZ, II→DZ, III→DZP, IV→TZP, and V→TZ2P.
  Similarly, the names for even-tempered basis sets in the $ADFRESOURCES/ET
  subdirectory have obtained similar names (VI→ET-QZ3P).
• Document the typical accuracy that can be obtained for diatomic molecules,
  using the various basis sets in ADF.
• Explain how even-tempered basis sets can be generated with the basis set utilities in ADF.