YCS Views 8 meanings found YCS is best known as the Yu‑Gi‑Oh! Championship Series in gaming, while in health and education it can refer to the UK’s Yellow Card Scheme for drug safety or various American school districts. Medical Yellow Card Scheme Young Chronic Sick Community Youngstown City Schools Your Carnation Sister Yelm Community Schools Regional Chesterfield Inlet, NorthWest Territories, Canada Computing Yu-Gi-Oh! Championship Series Business Yetter Consulting Services, Inc.