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Handheld Portal Device
The Aperture Science Handheld Portal Device (also known as the Portal Gun or ASHPD) is the experimental tool designed to place two portals that objects can pass through. This is the primary tool players are equipped with to complete Test Chambers.



Cave Johnson
Cave Johnson is the founder of Aperture Science, which was built from Aperture Science Innovations. He was briefly mentioned in Portal, but makes a more prominent appearance in Portal 2, in the form of tape recordings he leaves behind.