The Matrix pack is a prototype Terran personal shield. It was developed after the First Great War. Many terran defense companies tried to salvage some Protoss plasma shield technology in the hopes of fielding their own variant of personal shields (Stargate - Atlantis: Personal shield emitter). Through many trials and errors, a company from the Umojan Protectorate managed to reduce the size of the temporary ones used by Science vessels into a backpack shaped device capable of fitting most powered armor.