@techreport{TR-IC-98-09,
  number = {IC-98-09},
  author = {Osvaldo Luiz de Oliveira and M. Cecília Calani Baranauskas},
  title = {A Semiótica e o Design de Software},
  month = {April},
  year = {1998}, 
  institution = {Institute of Computing, University of Campinas},
  note = {In Portuguese, 29 pages.
    \par\selectlanguage{english}\textbf{Abstract}
      Software interface can be understood as a sign
      system manifested in computational processes, which
      people consciously or unconsciously create as they
      use or interpret systems.  In this approach the
      computer has the role of a medium - a physical
      substance in which signs are manifested and used for
      communication.  The aim of this work is to situate
      the reader in the context of the Semiotic Theory,
      presenting its foundations and roots, and to discuss
      the understanding of software design using the
      perspective of semiotic systems.
  }
}