BPO, Outsourcing and Shared Services Centers in Poland. A complete Directory. An exhaustive listing of companies in the outsourcing and SSC sector in Poland. Definitions of outsourcing are deliberately broad, and includes the large sectors of shared service centers, BPOs providing external services, as well as R&D centers, IT and software development, and call centres. This year, we have a total of 600 firms listed. Research sources included PAIZ, many Polish city officials, and both associations ASPIRE and ABSL. Magazine includes profiles of top center-managers.