USRC and LANL's HPC (formerly C and CCN division) have been building and operating advanced computers for LANL's mission for decades.
Here are some of the artifacts of that history.
Newsletters, Magazines, etc.
Los Alamos National Laboratory's computing and communications have released a large collection of newsletters which shine a light on the history of computing at LANL at the time. These scanned in documents are hosted on a LANL FTP server and are approved for public release. Each file name has the LALP (an equivalent version of what is today called LAUR).
General HPC talks
A Long History of Supercomputing
What's New in High Performance Computing
The Next Frontier in Computing
Richard Feynman Lecture - "Los Alamos from Below"
A Rigorous Comparison of the D-Wave 2X QPU to Established B-QP Solution Methods
Applications
Ocean Modeling
Los Alamos Asteroid Killer
LANL Prepares for 2012 Fire Season
Systems
LANL to help develop next supercomputer
An Affordable Supercomputer Testbed based on Raspberry Pi
CDC 6500 supercomputer at the Living Computers Museum + Labs
The Cray Way
Cray Research - A Story of the Supercomputer
MANIAC Slide Show
9 Fastest Supercomputers
Silicon Valley Computer Museum Enigma, Eniac, Cray-1, IBM 1401