Relations and Diplomacy. Research In addition to the research centers and institutes of the university, there are numerous research institutions situated in the city of Heidelberg. Among them are the European Molecular Biology Laboratory (EMBL), European Molecular Biology Organization (EMBO), the German Cancer Research Center (DKFZ), Max Planck Institute for Medical Research, Max Planck Institute for Astronomy, Max Planck Institute for Nuclear Physics, Max Planck Institute for Comparative Public Law and International Law. Schools Heidelberg is home to 23 elementary schools. There are several institutions of secondary education, both public and private, representing all levels of the German school system. There are 14 Gymnasiums, with six of them private. With 52% of secondary students attending a Gymnasium, Heidelberg sits above the German average, perhaps because a large number of academics live in Heidelberg and its environs. The gymnasiums include the , , Helmholtz-Gymnasium, Hölderlin-Gymnasium and Elisabeth-von-Thadden-Schule. Then there are seven Realschule, ten Hauptschule and nine vocational schools (the so-called Berufsschule). In addition, there are several folk high schools with different specialisations. Heidelberg International School serves the local expatriate community. Economy Tourism In 2004, 81.8% of people worked for service industries, including tourism. As a relic of the period of Romanticism, Heidelberg has been labeled a "Romantic town". This is used to attract more than 11.9 million visitors every year. Many events are organized to attract visitors. One of the biggest tourist attractions is the Christmas market during the winter time. Industry Only 18% of employment is provided by industry. Printing and publishing are important enterprises; nearby Walldorf is a center of the IT industry and SAP World Headquarters. Noted pen manufacturer Lamy has its headquarters and factory in Heidelberg-Wieblingen. Heidelberger Druckmaschinen has its headquarters here; its factory is located in Walldorf. Soft-drink company Wild-Werke, manufacturer of the Capri-Sonne (Capri-Sun in the U.S.) is located nearby in Eppelheim. Heidelberg is also home to the headquarters of HeidelbergCement, the world's second largest cement producer. The company has its roots in the suburb of Leimen where one of its cement plants is still located. With its long Hauptstraße, Heidelberg is a shopping destination for people from the surrounding smaller towns. Roads The A 5 autobahn runs through the western outskirts of Heidelberg, connecting the region to Frankfurt am Main in the north and Karlsruhe to the south. The A 656 commences just west of the city, connecting Heidelberg with Mannheim. Both highways meet