There are multiple definitions:

1. electrochemical impedance spectroscopy(English)

   • Impedance/bioimpedance, Spectroscopy

2. electrical impedance scanning(English)

   • Impedance/bioimpedance
   • https://doi.org…608x.w1425.pub2

3. executive information system(English)

   • Medical informatics

4. Early Intervention Service(English)

   • a community awareness program did not reduce treatment delays for people experiencing first episode psychosis
   • Psychiatry
   • https://doi.org…2888-015-0485-y