Google's Andy Rubin has tweeted his distaste at Apple CEO Steve Jobs tirade against Android during Apple's financial results conference call on Monday evening.

Yesterday's post-financial results conference call is likely to go down in history as the moment Apple waved a red flag at its closest rivals, then sped off into the future, leaving them standing bemused in its wake. Steve Jobs made an almost unheard of contribution to the conference call, and took the opportunity to lay the gauntlet down, in style.

Apple is squaring up to challenge anyone who might try to catch its tail. Google's Android and BlackBerry maker RIM came under his wrath for their failings, in Jobs' eyes. As well as bashing the search engine giant for its own operating system claims, Jobs scoffed at the idea that a 7in tablet could ever be something a customer would want.

Jobs then went on to criticise Google, comparing the concept of Android as an open OS, compared to Apple's so called "closed" iOS.

Jobs said: "Google loves to characterize Android as "open," and iOS and iPhone as "closed". We find this a bit disingenuous, and clouding the real difference between our two approaches. The first thing most of us think about when we hear the word "open" is Windows, which is available on a variety of devices. Unlike Windows, however, where most PCs have the same user interface and run the same apps, Android is very fragmented. Many Android OEMs, including the two largest, HTC and Motorola, install proprietary user interfaces to differentiate themselves from the commodity Android experience. The user's left to figure it all out. Compare this with iPhone, where every handset works the same."

In response Rubin, leader of Google's mobile operating system, tweeted: "the definition of open: "mkdir android ; cd android ; repo init -u git://android.git.kernel.org/platform/manifest.git ; repo sync ; make"

Cnet translated Rubin's comments, explaining that the coded message represents the open nature of the open-sourced Android OS. "The tweet translates to making a directory, pulling in the Android source code, and building the operating system from scratch. In other words, exercising the full potential of open-source software, a pretty empowering idea for developers'" explains Cnet.

So far, only Andy Rubin has made any form of reply to Jobs' rant, but we expect more reports to surface later this week.

You can read the complete transcript of the conference call with Steve Jobs here.