Google is reinventing itself as a hardware maker too. Hardware has become the doorway to products and services, and the Internet giant seeks to get all kind of revenues. 

Last week at Google I/O, the company's annual conference for developers, Google unveiled:

• a new 7-inch tablet computer, called Nexus 7,
   
• a sphere-shaped $299 device for streaming music and video that it is calling Nexus Q,
  
  
• an eyeglass that comes with a camera and a tiny video screen, called Project Glass, and now a $1,500 prototype.

By selling Google-branded devices, the company also aims to protect its core search business as competitors hover, according to NYT.

Nexus 7 Android-powered tablet, priced at $199, in direct competition with Kindle Fire, will be manufactured by Asus, and will come with a powerful quad-core processor and all day battery life. Now it is available as pre-order.