What Did India Invent?

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This video has @omaragamyy of Inventions of India including:
0:00 Buttons
1:17 Shampoo
3:05 USB
4:02 Chess
5:00 Snakes And Ladders
6:28 Fiber Optics
7:21 Yoga
8:25 Flush System
9:26 Ruler
10:30 Cataract Surgery
11:30 Plastic Surgery
12:20 Candy
12:45 Using Natural Fibers
13:08 Zero
13:51 Pi