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Enterprise software giant SAP is an inescapable presence in the business world , thanks to its very well known enterprise resource planning software . SAP is far from the only company on this list with an American connection , in this case being the fact that the five SAP founders were German employees of computing giant IBM , who spun off their work into its own company . Another curio is that it is headquartered in the small town of Walldorf , eschewing a big-city location . technologymagazine . com