Z-plan castle, a form of castle design common in England and Scotland.
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Plan Zeta, an planned coup by the leftist government of Salvador Allende alleged by the soldiers who committed the 1973 Chilean coup d'état
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Plan Z, a set of captured World War II documents describing Japanese military plans to counterattack the Americans in the Pacific.
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Plan Z, a plan to re-equipment and expansion of the Nazi German Navy ordered by Adolf Hitler in 1939.
Marshall Plan | Israel's unilateral disengagement plan | Simple Plan | Colombo Plan | The Dillinger Escape Plan | Plan 9 from Bell Labs | British Commonwealth Air Training Plan | Kirkbride Plan | Button car plan | The Dismemberment Plan | The Daleks' Master Plan | Plan 9 from Outer Space | Plan | Ontario Teachers' Pension Plan | Plan Z | Plan B Entertainment | PLAN | North American Numbering Plan | Annan Plan for Cyprus | Stelly Plan | plan | Morris Plan Bank | Grid plan | County of London Plan | Young Plan | War Plan Orange | United Nations Partition Plan for Palestine | Tennessee Plan | Telephone numbering plan | Siniora Plan |