Twitter has sent out emails to all its users announcing the latest changes that they've made related to Twitter applications and URL shortening service.

"Over the coming weeks, we will be making two important updates that will impact how you interact with Twitter applications" Twitter announced.

Applications such as TweetDeck, Seesmic, Foursquare, Twitter for iPhone or Blackberry and others need your authorization before enabling you to read, post or find tweets. From now on, you no longer have to give in your password to these applications; thanks to OAuth.

OAuth is a technology that eliminates the need to provide your Twitter password to third party applications, however, mobile users may still have to enter their password once. Most of the applications have made the required changes, but some of them may need re-authorization from your end. You can manage authorization of these applications by clicking on this link.

Furthermore, Twitter will soon be rolling out their link wrapping service: t.co. Links shortened using this service will be easy to read because the shortened link will still consist the domain part of the link, therefore before clicking on any link, users will be able to see what they are clicking on.

"You will start seeing these links on certain accounts that have opted-in to the service; we expect to roll out to all users by the end of the year. When this happens, all links shared on Twitter.com or third party will be wrapped with a t.co URL" explains Twitter.

t.co URL will be usable only on Twitter and not as a general URL shortening service.

Twitter also plans to track number of clicks on a particular link with the intention of using " this data to provide better and more relevant content to you over time."