Bailment and Pledge: Kahan Hai Difference?

Yaar samajh nahi aaya! Main 3 mahino se bailment aur pledge ko confuse kar raha hoon. In dono concepts mein similarities bahut jyada hain, lekin main samajh nahi pa raha ki kahan hai difference. Sabse pehle, kya hai bailment? Woh to kuch property ki transfer hoti hai, lekin property ki owner baaki rahti hai. Phir pledges wala concept aata hai, jisme owner property ko kisi bank ya financial institution ko deti hai. Lekin phir woh property ki owner kya hoti hai? Kya voh bank ya financial institution? Aur kya pledge to kuch aur hi hai jo kisi property ka lien hota hai? Plz help, kuch clear explanation do!