“GAFAM A more inclusive grouping referred to as GAFAM or "Big Five", defines Google, Amazon, Facebook, Apple, and Microsoft as the tech giants.[18][19][20][21] Besides Saudi Aramco, the GAFAM companies are the five most valuable public corporations in the world as measured by market capitalization.[3] Nikos Smyrnaios justified the GAFAM grouping as an oligopoly that appears to take control of the Internet by concentrating market power, financial power and using patent rights and copyright within a context of capitalism.[22]“

https://en.m.wikipedia.org/wiki/Big_Tech