expertise, auditing, and consulting for companies; financial and tax advice, mergers, and acquisitions; international trade without limitation; real estate transactions in Switzerland, within the limits authorized by law, and abroad; feasibility studies, engineering, training, and financing; administration of companies and participation in commercial, industrial, or financial companies; management, domiciliation, and representation of companies; acquisition, exploitation of patents. Purchase, processing, and sale of claims, leasing and management of establishments, cafes, hotels, restaurants, and leisure facilities.