Google, a pioneer in AI, has been focusing on four key components - computing, algorithms, data and expertise -- to organise all the data and make it accessible. Google as a company has always been at the forefront of computing AI," Fei-Fei Li, Chief Scientist of Google Cloud AI and ML, told reporters during a press briefing. Earlier this year, Google announced the second-generation Tensor Processing Units (TPUs) (now called the Cloud TPU) at the annual Google I/O event in the US. The company offers computing power including graphics processing unit (GPUs), central processing units (CPUs) and tensor processing units (TPUs) to power machine learning.

As machine learning - the ability of computers to learn without being explicitly programmed - gets more mainstream and involved in our lives, here is how machines learn.