What is difference between Bootstrap, Twitter Bootstrap, and Bootstrap 3?

Question

Can someone let me know what is the difference between Bootstrap, Twitter Bootstrap and Bootstrap 3?

Answer 1

As Bootstrap came from the 2 famous guys at Twitter, hence sometimes it's called Twitter Bootstrap. Bootstrap 3 is the latest version.(I guess version 4 is on its way).

An excerpt from Wikipedia:

Bootstrap, originally named Twitter Blueprint, was developed by Mark Otto and Jacob Thornton at Twitter as a framework to encourage consistency across internal tools. Before Bootstrap, various libraries were used for interface development, which led to inconsistencies and a high maintenance burden.