🔥 → 🕯️→ 💡
🚶♂️ → 🏇 → 🚂 → 🚙
🗂️→ 💾 → 💿 → ☁️
🖼️ → 📸 → 🎥 →📱
🗣️ → 📜 → 📖 → 📞 → 📻 → 📺 → ...
Information...Increasingly efficient over time.