Imagine walking into a factory where machines predict their own breakdowns. Or a hospital where a computer scans thousands of images to spot a tumor a doctor might miss. Or a shop that knows what you need before you even ask. These aren’t scenes from a sci‑fi movie — they’re real, and they’re powered by a handful of core digital technologies. In this chapter, we’ll look at the key tools driving digital transformation: artificial intelligence, the Internet of Things, big data, cloud computing, lightning‑fast networks, and natural language processing. We’ll explore what each one does, how they work together, and what challenges they bring.