[visarga]

In case you want to shorten the title in similar situations ("The GAFA War"):

FAMGA - Facebook, Apple, Microsoft, Google, Amazon

GAFA - Google, Amazon, Facebook, Apple

FANG - Facebook, Amazon, Netflix, Google

[jrs95]

Personally I'd keep Microsoft included, they're killing it with services now. Especially amongst enterprise consumers.

[user5994461]

or call them the big four.