5/5 Aleks Krotoski tells the story of how GPS helped navigation in the first Gulf War.
4/5 How the teashop and cake company Lyons built the first business computer in the 1950s.
3/5 How Our World became the first programme to link the globe by satellite in June 1967.
2/5 How Paul Robeson used the transatlantic telephone cable to sing live to British fans.
1/5 Aleks Krotoski reveals how telephone exchanges changed young women's working lives.