Defense Experimental Research Project Initiative

Defense Experimental Research Project Initiative was a pre-War United States military grant project, responsible for funding ambitious and innovative projects that could serve the defense of the nation.

Background
One of the beneficiaries of DERPI was Cambridge Polymer Labs, LLC, thanks to the nucleostrictive and piezoelectric polymer research conducted by its founders, Jon Elwood, Ericka Elwood-Woolum, and Wilfred Bergman.

Appearances
The Defense Experimental Research Project Initiative is mentioned only in Fallout 4.