Which retail/technology giant has secured the largest cloud computing contract with the U.S. federal government to date (as of 2023)?

Government procurement represents a massive market, with billions spent annually on technology, infrastructure, and services. Major corporations compete intensely for these lucrative contracts, often establishing dedicated public sector divisions. This trivia question explores which retail/tech giant has established the most dominant position in government contracting - revealing important connections between corporate strategy and public governance. How well do you understand the intersection of retail giants and government spending?

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Microsoft (with the $10 billion JEDI contract, later replaced by Joint Warfighter Cloud Capability)
Amazon Web Services (with the CIA Commercial Cloud Services contract)
Google (with the Defense Innovation Unit cloud solution)
Oracle (with the Government Cloud Infrastructure program)