Defense Special Security Communications System (DSSCS) Opera

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
DOI
Pronunciation
/dɪˈfɛns ˈspɛʃəl sɪˈkjuːrəti kəˌmjuːnɪˈkeɪʃən ˈsɪstəm ˈɒpərə/
Category
Governmental
Related Field
Military

Other meanings of DOI