ITIS

The abbreviation stands for IT:

• Integrated Taxonomic Information System, an international project to deliver consistent taxonomic data for cataloging biodiversity
• Integrated Transport Information System, a traffic management system in Klang Valley, Malaysia

Itis stands for:

• The Greek suffix -itis ( older Greek - ίτις, newer - ίτιδα, ITIDA ), which usually refers to an inflammatory disease

• Disambiguation
• Abbreviation