The “written history” of the chromatography is a hundred years old although the current chromatographic methods are based on the results of the chromatographic developments of the last fifty years. Hungarian scientists also participated in the developments; many of them became the dominant figures of the chromatography. The most prominent among them are István Halász, Csaba Horváth, Ervin sz. Kováts, László Ettre. According to rumors, in professional circles they were called "Hungarian mafia". All of them were active in different fields of chromatography. Some of them focused on theoretical work, while others concentrated practical achievements. Horváth is generally credited with building the first HPLC instrument. And the Nature and Analytical Chemistry papers he published with Lipsky may indeed have been the first published reports of modern HPLC. László Ettre was one of the pioneer of capillary chromatography and he published a lot about the history of chromatography. Istvan. Halasz's scientific contributions including: simple approximation for Pressure Correction Factor in gas chromatography. Ervin sz. Kováts is known for his activities in developing the retention index system for the gas chromatographic identification of individual compounds. These are just some of the scientific activities of them.