What does SOLIS stand for?

SIGINT On-Line Information System (SAUS)

Sozialwissenschaftliches LiteraturInformationssystem - Database - Informationszentrum Sozialwissenschaften - Social Sciences Literature Information System - German - Information service or system (CRD)

Student Organizations of Library and Information Science

Symbionics On-Line Information System - Computer science

Synoptic Optical Long-Term Investigations of the Sun