What does POLIS stand for?

Parliamentary On-Line Indexing Service - United Kingdom (GDD)

Parliamentary On-Line Information System - House of Commons Library - Bibliographic database - Information service or system - British (IID)

Parliamentary Online Library Study (SAUS)

Petroleum Intersectional Service - Army

Police Information and Statistics Committee - Law enforcement (FOTI)

Political Institutions Simulation - Game

Polynomial Interpreting System (SAUS)