Google is doing step by step with the shortening of URLs. First was closed goo.gl, Used only by FeedBurner and Google Toolbar (Maps came later). Then it became available to anyone could shorten with goo.gl. Of course, only from its website.
Today we can say that Google has a full shortening due to the opening of its API. With it, any programmer can shorten URLs or expand with goo.gl from your
