R Ravinder Singh 🎓 Extraordinary ⭐ 2.62K Points 📊 Computer Q. Which device uses a handheld operation system ? (A) APDA (B) A personal computer (C) A laptop (D) A mainframe 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) APDA You must be Logged in to update hint/solution 💬 Discussion 💬 Comment