HP F1391-60929 - BIOS door - Covers BIOS IC - Mounted on bottom of OmniBook near module release latch Retail
HP F1371-60905 - Bottom case (Chassis) - Includes the bottom case with internal supports - Bottom of OmniBook Retail
HP F1320-60927 - Door/cover - For memory expansion slots - Mounted on bottom of OmniBook - User replaceable Retail