WIIS stands for Women In International Security, a global non-governmental organization founded in 1987 that promotes gender equality and the advancement of women as leaders in international peace and security. The organization provides professional development, mentorship programs, research, and policy initiatives focused on integrating gender perspectives in security, defense, and peacebuilding fields. WIIS has a global network with thousands of members across multiple countries, aiming to strengthen national and international security through women's leadership and feminist approaches to security challenges. It also addresses issues like climate security, disarmament, and pandemic resilience with a gender lens. Besides this, WIIS can refer to a weather information and early warning system software tailored primarily for optimizing electricity grid operations based on meteorological data, helping operators manage weather-dependent processes efficiently. Additionally, WIIS is known as a U.S. radio station call sign but is less commonly referenced compared to the above meanings.