The Pan-STARRS project is planning to build a suite of four telescopes (PS4) on the summit of Mauna Kea at the site of
the current University of Hawaii 2.2-m telescope. These telescopes will have the goal of surveying the entire sky visible
from a single site in 5 colors (g, r, i, z, and y) on the time scale of approximately 1 week at a spatial resolution limited
primarily by the quality of the site. To accomplish this task each of these four telescopes will be equipped with a
Giga-Pixel camera, a camera shutter, and a 6 filter mechanism. A prototype telescope for this project (PS1) that includes all of
these subsystems is already under going commissioning. The project is currently involved in developing the
Environmental Impact Statement that is required to build the PS4 array of telescopes. We give an overview here of the
scientific goals, the instrumentation package, the telescope design, and the enclosure design for the PS4 system.