GCP, AWS, Azure, IBM cloud: $ billions

what is the size of "cloud computing" business?

Google's Diane Greene: People were 'grossly underestimating' its cloud

"Google's cloud doesn't have any more "deal blockers" in the way of new business, Google Cloud CEO Diane Greene told CNBC (Greene was a founder and CEO at VMware)

Google CEO Sundar Pichai announced that the Google Cloud Platform and the G Suite portfolio of productivity apps, combined, now represent a "billion-dollar-per-quarter business."

Amazon Web Services brought in more than $5 billion in the quarter. 

Microsoft had said its commercial cloud business, including the Azure public cloud, had revenue exceeding $5 billion during the quarter."

Amazon To Become #1 In Cloud-Computing Revenue By Beating IBM's $17 Billion



List of the largest information technology companies - Wikipedia

Mobile phones businesses (Apple, Samsung) are still 10x larger than "cloud"...