Facebook, Amazon, Netflix, Google. Jim Cramer created the acronym to name these four companies as high-performing tech stocks years ago [0]. But now, as in the above usage, it is more of a catch-all name for the big tech companies. And in its new role as a name for a category of companies, people confuse Amazon/Apple, and also implicitly include other equivalent companies.
[0] https://www.thestreet.com/story/13230576/1/what-are-fang-sto...