What is the technical (functional) different between a Gadget and a Widget?

Question

Already I found this "Widget" or "Gadget"? related to this question,

But I'm looking really for the technical/ Functional differences between those two.

Answer 1

Go to http://www.google.com/webmasters/gadgets/ and read this:

Gadgets powered by Google are miniature objects made by Google users like you that offer cool and dynamic content that can be placed on any page on the web.

So any gadget like Google Gadgets can be placed on any page on the web