It seems like you're referring to SIS International (SIS INT'L), but could you clarify which specific organization or company you're asking about? There are several entities with similar names across different industries、Here are a few possibilities:

1、SIS International Research – A global market research and intelligence firm specializing in surveys, data collection, and consulting、
2、Security and Intelligence Services (SIS) India – A leading security solutions provider in India、
3、SIS Group of Schools – An international network of schools offering IB and other curricula、
4、Special Intelligence Service (SIS) – Sometimes used to refer to intelligence agencies like MI6 (UK’s Secret Intelligence Service)、

Could you specify which one you’re interested in, or provide more context? I’d be happy to help!