Computers have become so powerful that the idea they can’t just do, you know, *everything* is almost unfathomable. Yet many calculations are still too big for even the biggest supercomputer to process. That’s where the promise of quantum computing comes in. Scientist and TED Fellow Jonathan Home explains.

Dame Stephanie Shirley founded a women-only computing company in 1962, determined to do her work on her terms, and to hell with the glass ceiling. In this video, introduced by US CTO Megan Smith, admire the feisty spirit who upended tech world sexism by refusing to accept it.