TNCS Views 7 meanings found TNCS is used to refer to large multinational firms, power‑grid control platforms, major health surveys, corporate entities, or educational institutions, depending on the sector. Medical Third National Cancer Survey Miscellaneous Transnational Corporations Transmission Network Control System Community The New Century School The New Community School Regional Saba-Yrausquin, Netherlands Antill Business Tinci Hldg Regs