* Pressurized Mating Adapter (PMA): Converts an active Common Berthing Mechanism to APAS-95. Three PMAs are attached to the ISS, PMA-1 and PMA-2 were launched in 1998 on STS-88, PMA-3 in late 2000 on STS-92. PMA-1 is used to connect the Zarya control module with Unity node 1, Space Shuttles