Apple Inc. is an American multinational consumer electronics, software and online services technology company headquartered in Cupertino, California, United States. Apple is the largest IT company by revenue (US$365.8 billion in 2021 total) and as of May 2022 is the world's second largest company by value, fourth largest seller of personal computers by unit sales and second largest company mobile phone manufacturer. It is one of the five largest US IT companies, along with Alphabet, Amazon, Meta, and Microsoft.