Androgynous Peripheral Attach System
The terms Androgynous Peripheral Attach System ( APAS ) , Androgynous Peripheral Assembly System ( APAS ) and Androgynous Peripheral Docking System ( APDS ) , are used interchangeably to describe a family of spacecraft docking mechanisms , and are also sometimes used as a generic name for any docking system in that family . 
<triplet> Androgynous Peripheral Attach System <subj> spacecraft docking mechanism <obj> subclass of