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The KPNO International Spectroscopic Survey (KISS) is a new objective-prismsurvey for extragalactic emission-line objects. It combines many of thefeatures of previous slitless spectroscopic surveys that were carried out withSchmidt telescopes using photographic plates with the advantages of modern CCDdetectors. It is the first purely digital objective-prism survey, and extendsprevious photographic surveys to substantially fainter flux limits. In this,the first paper in the series, we give an overview of the survey technique,describe our data processing procedures, and present examples of the types ofobjects found by KISS. Our first H-alpha-selected survey list detects objectsat the rate of 18.1 per square degree, which is 181 times higher than thesurface density of the Markarian survey.Since the sample is line-selected,there is an imposed redshift limit of z ~ 0.095 due to the filter employed forthe objective-prism observations. We evaluate the quality of the observedparameters derived from the survey data, which include accurate astrometry,photometry, redshifts, and line fluxes. Finally, we describe some of the manyapplications the KISS database will have for addressing specific questions inextragalactic astronomy. Subsequent papers in this series will present oursurvey lists of emission-line galaxy candidates.Comment: 19 pages, 8 figures, A.J. in pres

The KPNO International Spectroscopic Survey. I. Description of the Survey