In one concise paragraph, discuss one technical advance that we’ve learned about since Sept. 3 and why that advance was important. It can be a machine, a technique (like a programming technique), or a specific idea. Your response should show us its importance in a broad sense: this is your opportunity to answer the “so what?” question of why a particular historical event matters. Be original and creative: your response should tell us something non-obvious about the advance you choose.