Shield Worlds are represented by a symbol described as a "double-lobed icon". The symbol was described when Dr. Halsey was compiling her data with the AI Endless Summer . While Dr. Halsey was working, CPO Mendez asked her what the symbols on the screen are. Dr. Halsey replied that they are Forerunner symbols from the ruins on Onyx, and their theoretical translations. As she continued to work, Mendez then asked the meaning of a double-lobed glyph. Dr. Halsey replied that the symbol, roughly translated, means Shield World.