Original sentence: One grouping includes Google, Apple, Facebook, and Amazon, which has been called "GAFA", the "Gang of Four" (after the Gang of Four political faction in China), and the "Four Horsemen" (after the Four Horsemen of the Apocalypse).The term "Big Tech" has been used in journalism to refer to the largest and most dominant companies in the information technology industry.The terms "Big Four" and "Big Five" are frequently used.There have been different definitions and names for the groups of largest companies by different authors
Edited sentence: The Big Four includes Google, Amazon, Facebook, and Apple and is often referred to as GAFA, the Gang of Four, and the Four Horsemen.The Big Tech grouping always includes Amazon, Apple, and Google and differs in its inclusion of Facebook and Microsoft depending on the author and source.The term Big Tech has been used in society, culture and media to refer to the largest and most dominant companies in the information technology industry.Two widely known Big Tech groupings are Big Four and Big Five