TIS, Tis or Tis may refer to: Organisations Taporoporo'anga Ipukarea Society, an environmental NGO based in the Cook Islands TransInvestService (TIS), is a large Ukrainian private terminal operator and stevedore operating in the Port of Yuzhny Transparency International Slovakia, an anti-corruption non-governmental organization Trusted Information Systems, a former computer security research and development company The International School of Macao, a Canadian international school in Macao The International School, Karachi, a private school in Karachi, Sindh, Pakistan Places Tis (Havlíčkův Brod District), a municipality and village in the Czech Republic Tis u Blatna, a municipality and village in the Czech Republic Tis, a village and part of Janov (Rychnov nad Kněžnou District) in the Czech Republic Tis, Iran, a village Other uses Tin Shui Wai station (MTR station code TIS), Hong Kong Travelers' information station, providing information by radio to motorists Truth in sentencing, policies on criminal sentencing 'Tis, a 1999 memoir by Frank McCourt Tis, In molecular biology and genetics translation initiation site Triisopropylsilane, or TIS, a hydrosilane Technological innovation system Tensilica Instruction Extension, a proprietary language for customizing Tensilica's Xtensa processors See also 'Tis the Season (disambiguation)