Brothers Udo and Harald Tschira may have a huge combined wealth, but neither have children. They inherited their money in turn from their father Klaus Tschira (pictured), an ex-ITM employee who co-founded German software giant SAP in the 1970s. SAP became the biggest producer of business management software on the planet, and Klaus set up a foundation to inspire a love of science and IT.
His less high-profile sons Udo and Harald, who are aged 54 and 50 respectively, continue his foundation's work.