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TISDTomball Independent School District (Tomball, TX)
TISDTechnology and Innovation for Sustainable Development (conference; Thailand)
TISDTexarkana Independent School District (Texas, USA)
TISDTransportation Infrastructure Security Division
TISDTactical Information Systems Division
TISDTactical Internet System Description
TISDTheater Integrated Situation Display
TISDTeacher In-Service Day
TISDTurkish Institute for Security and Democracy (Washington, DC)