Bailment or Pledge? I'm so confused!

Aur maine to socha hai ki kya difference hai? Maine suna hai ki in dono ke liye "delivery of goods" ki shart hoti hai, par kya "voluntary transfer of title" vhi hai? Agar maine kisi friend ko laptop pledge kar di hai, tab uske paas kaunsi cheez hai - mine ya mere ownership? Aur agar maine use loan liya hai to kya woh mere possession mein hai ya uske pass? Aur kya pledge aur bailment mein "delivery" ki zaroorat hai? Maine socha hai ki kuch to nahi, par koi bata nahi hai. Aur kuch book mein pledge ke liye "intention to create a security interest" liya gaya hai, par kya uska implication hai.