alt Hacker NewsThe article directly mentions several.
> Teams across AWS that build some of its flagship products—from storage (e.g., Amazon S3, EBS), to databases (e.g., Amazon DynamoDB, MemoryDB, Aurora), to compute (e.g., EC2, IoT)—have been using P to reason about the correctness of their system designs.
Later it more specifically mentions these (I probably missed a few):
S3 index, S3 ShardStore, Firecracker VMM, Aurora DB engine commit protocol, The RSA implementation on Graviton2
(EDIT: formatting)
If you are wondering "why do formal methods at all?" or "how is AWS using P to gain confidence in correctness of their services?", the following re:Invent 2023 talk answers this question, provides an overview of P, and its impact inside AWS: (Re:Invent 2023 Talk) Gain confidence in system correctness & resilience with Formal Methods (Finding Critical Bugs Early!!) - https://www.youtube.com/watch?v=FdXZXnkMDxs
Github: https://github.com/p-org/P