Do Not Track has shot to the top of the privacy agenda among regulators in Washington. The FTC staff privacy report released in December endorsed the idea. Microsoft announced that next release of Internet Explorer will include a feature called Tracking Protection. Microsofts new Tracking Protectiont the same as the proposed Do Not Tracking proposal, but their efforts are distinct from the proposed proposal. The HTTP standard is an extensible one, and it allows an open-ended set of headers to be defined for it.”]
Source: https://freedom-to-tinker.com/2011/01/11/some-technical-clarifications-about-do-not-track/