Trinity (or ATS-1) is a United States supercomputer built by the National Nuclear Security Administration (NNSA) for the Advanced Simulation and Computing Program (ASC).

[2] The aim of the ASC program is to simulate, test, and maintain the United States nuclear stockpile.

There are 301,952 Haswell and 678,912 Knights Landing processors in the combined system, yielding a total peak performance of over 40 PF/s (petaflops)[4] There are 5 primary storage tiers; Memory, Burst Buffer, Parallel File System, Campaign Storage, and Archive.

[11] Cray supplies the three hundred XC40 Data Warp blades that each contain 2 Burst Buffer nodes and 4 SSD drives.

[11] Trinity uses a Sonexion based Lustre file system with a total capacity of 78 PB.