Whats HDR ?

Kannan pinged and asked me if I have ever tried HDR. A couple of days later, my Dad asked me the same question. Suprising. I wanted to try this out for quite sometime. I decided to try this out at home during the weekend. Sadly, my tripod is not too stable nor was I able to get a good image.I decided to chk this out with pics that I shot earlier. So, heres what I got. BTW, HDR stands for High Dynamic Range