  The Maunakea Spectroscopic Explorer (MSE) is replacement of the existing
3.6-m Canada France Hawaii Telescope into a dedicated wide field highly
multiplexed fiber fed spectroscopic facility. MSE is capable of observing over
four thousand science targets simultaneously in two resolution modes. The paper
describes the unique instrument system capabilities and its components starting
from the telescope prime focus and ending at the spectrograph suite. The
instrument system components have completed their conceptual designs and they
include a Sphinx positioner system, fiber transmission system, low/moderate
resolution and high resolution spectrographs and a calibration system. These
components will be procured separately and the Project is responsible for their
integration and the overall system performance afterward. The paper describes
from a system perspective the specific design and interface constraints imposed
on the components given the extra interface and integration considerations.
