A technology company (or tech company) is a company that focuses primarily on the manufacturing, support, research and development of—most commonly computing, telecommunication and consumer electronics–based—technology-intensive products and services, which include businesses relating to digital electronics, software, optics, new energy, and Internet-related services such as cloud storage and e-commerce services.
Big Tech refers to the five largest technology companies in the United States, symbolized by the metonym "Silicon Valley", where they are based.
[1] Amazon has higher revenue than Apple, but is classified by Fortune in the retail sector.
[2] The most profitable listed in 2020 are Apple Inc., Microsoft, Alphabet Inc., Intel, Meta Platforms, Samsung, and Tencent.
These five technology companies dominate major functions, e-commerce channels, and information of the entire Internet ecosystem.