Ralph Land, who has died aged 97, was half of a twin partnership that helped construct something genuinely new in the world: LEO, the Lyons Electronic Office, the first computer built not for military calculation or academic research but for business. He and his brother Frank joined J Lyons & Co after studying at the London School of Economics, and from there entered the team that made commercial computing real in the 1950s. The backstory is as structurally important as the achievement. The Land twins were born in Berlin into a middle-class Jewish family whose manufacturing business, founded by grandfather Aron Landsberger, was expropriated by the Nazis for one mark after Kristallnacht. The family escaped to Britain in April 1939. Their father Louis was interned on the Isle of Man. Their mother Soscha earned income making felt handbags and dolls' dresses. The twins were fostered by the Gentles in Bedmond, Hertfordshire. What happened next is the generative pattern at its clearest. Britain took in refugees, educated them at Willesden county grammar school and LSE, and two of those refugees helped build the country's first business computer. From 1964, Ralph turned that capability outward, securing contracts from Soviet bloc governments for English Electric Leo Marconi, then ICL, then Rank Xerox. He was selling British technology to the other side of the Iron Curtain — a commercial diplomat operating in spaces where politics and trade were inseparable. The Soviet collapse in the 1990s opened a second act. Ralph became leader of the Russo-British and other trade councils, adviser to firms and government, and commentator on post-Soviet Russia and eastern Europe. He remained active in public life well into his 80s as deputy chairman of the Westminster Foundation for Democracy and president of the London Rotary Club. He was appointed OBE in 1985 and advanced to CBE in 1995. Ralph married Jacqueline Bourdin in 1954 — she had come from France in the late 1940s, worked as an au pair, then found secretarial work at the Belgian airline Sabena. Their sons were born in 1959 and 1960. The family lived in Paris and Düsseldorf in the mid-1970s before settling in Fulham, London. Jacqueline died in 2009. Frank died earlier this year. The GRIN lens on an obituary is unusual but clarifying. This is a story about what happens when a society absorbs displaced people and gives them access to education and institutions. The return on that investment — measured in technological capability, trade relationships, and institutional service — ran for seven decades. The extraction ran the other direction: Nazi Germany destroyed a family's wealth and expelled their talent; Britain collected the dividend. Ralph Land is survived by his sons Anthony and the obituary's author, and a granddaughter. He held strong social democratic values, was a lifelong Labour supporter, and backed initiatives in peace, health, education, and the arts. The life is a data point in the oldest argument in immigration policy: whether newcomers create value or consume it. This one created it, at industrial scale, for 70 years.