  The Imaging and Slitless Spectroscopy Instrument (ISSIS) will be flown as
part of the Science Instrumentation in the World Space Observatory-Ultraviolet
(WSO-UV). ISSIS will be the first UV imager to operate in a high Earth orbit
from a 2-m class space telescope. In this contribution, the science driving to
ISSIS design, as well as main characteristics of ISSIS are presented.
