A major battle is taking place in the world of tech. On one side, there's Amazon - the online shopping juggernaut that now provides the world with a massive portion of its cloud computing needs as well as lots of other associated products and services. On the other there's Google - the search engine that has shifted into becoming a major provider of cloud services as well as dominating online advertising.

The two are also clashing over control of the next generation of tech for the home. As a result, Amazon has pulled sales of the Nest range of smart home accessories from its store.