HP F1081-60930 - Expansion door/cover - On back left area of OmniBook - Smallest of the two doors/covers on rear of OmniBook Retail
HP F1081-60931 - I/O door/cover - For serial, video out, & mouse/keyboard ports largest of the two doors/covers on rear of OmniBook Retail
HP F1391-60976 - I/O door assembly (Includes door and hinge) - Mounts on rear of OmniBook and covers I/O ports Retail