TL;DR: Five fun computer facts — plus the modern facts every UK business actually needs to know. The classics still hold up: room-sized first computers, wooden mice, and a gigabyte that once cost a fortune. 43% of UK businesses reported a cyber breach or attack in the past 12 months — computers are now a security responsibility, not just a tool. Cyber Essentials has become a gateway to winning contracts, especially in healthcare and defence supply chains. AI has moved from novelty to everyday workflow — nearly two-thirds of UK organisations now use it.