Plan 55-A was an automatic, electromechanical store and forward message switching system.
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 |