# ORCA 6.0 Manual ```{image} images/ORCA_Logo_2.* :alt: ORCA :width: 80% :align: center ``` **- An *ab initio*, DFT and semiempirical SCF-MO package -** **Version 6.0** *Design and Scientific Directorship:* **Frank Neese**\ *Technical Directorship:* **Frank Wennmohs** Max-Planck-Institut für Kohlenforschung\ Kaiser-Wilhelm-Platz 1, 45470 Mülheim a. d. Ruhr, Germany\ `department-mts@kofo.mpg.de` *With contributions from:*\ Daniel Aravena, Michael Atanasov, Alexander A. Auer, Ute Becker, Giovanni Bistoni, Dmytro Bykov, Marcos Casanova, Vijay G. Chilkuri, Pauline Colinet, Dipayan Datta, Achintya Kumar Dutta, Sebastian Ehlert, Nicolas Foglia, Marvin Friede, Dmitry Ganyushin, Miquel Garcia, Tiago L. C. Gouveia, Yang Guo, Andreas Hansen, Ingolf Harden, Benjamin Helmich-Paris, Lee Huntington, Róbert Izsák, Riya Kayal, Emily Kempfer, Christian Kollmar, Axel Koslowski, Simone Kossmann, Lucas Lang, Marvin Lechner, Spencer Leger, Dagmar Lenk, Dimitrios G. Liakos, Dimitrios Manganas, Dimitrios A. Pantazis, Anastasios Papadopoulos, Taras Petrenko, Peter Pinski, Philipp Pracht, Christoph Reimann, Marius Retegan, Christoph Riplinger, Michael Roemelt, Masaaki Saitow, Barbara Sandhöfer, Kantharuban Sivalingam, Bernardo de Souza, Georgi Stoychev, Van Anh Tran, Willem Van den Heuvel, Zikuan Wang, Hang Xu *And contributions from our collaborators:*\ Mihály Kállay, Stefan Grimme, Edward Valeev, Garnet Chan, Jiri Pittner, Martin Brehm, Lars Goerigk, Vilhjálmur Åsgeirsson, Liviu Ungur *Additional contributions to the manual from:*\ Wolfgang Schneider ```{only} html **Manual as PDF: {download}`orca.pdf <_build/latex/orca.pdf>`** ``` ```{raw} latex \frontmatter ``` ```{toctree} :caption: 'Preface' :maxdepth: 2 contents/foreword contents/changes contents/faq ``` ```{raw} latex \mainmatter ``` ```{toctree} :caption: 'Main Part' :maxdepth: 2 :numbered: contents/general contents/architecture contents/calling contents/structure contents/input contents/running contents/docu contents/tipps ``` ```{raw} latex \begin{appendix} ``` ```{toctree} :caption: 'Appendix' :maxdepth: 2 contents/public bibliography ``` ```{raw} latex \end{appendix} ```