Aegis is the shield of the Greek god Zeus. Aegis can also refer to:

AEGIS is one of the largest HIV/AIDS databases in the world, includes the HIV Daily Briefing, updated hourly.

AEGIS is a London based, privately owned, British security and risk management company with overseas offices in Afghanistan, Bahrain, Iraq and the USA

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The Aegis combat system is an integrated weapons system used by the United States Navy. It is both an integrated single ship system and a ship-to-ship network.