Import Data from Spanish Sociological Research Center (CIS) // Search and import data directly to R from the Spanish Sociological Research Center (CIS) https://www.cis.es/inicio. The CIS is a public institution that conducts electoral and sociological research studies on the Spanish society. The CIS has a large database of surveys that can be accessed through its website. The package includes functions to search for surveys, survey questions and timeseries, and import the data directly to R.