A system for writing and/or reading information using DNA. The information is translated into at least one information containing DNA sequence. At least one basic DNA sequence is preselected. A DNA molecule of user-defined sequence that contains said at least one information containing DNA sequence and said at least one basic DNA sequence is synthesized.
 The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.