The Personal Digital Assistant (PDA) Lara carries in Tomb Raider: Legend takes over most functions of the Inventory. Lara can not only check out her gear there, but she can also store and read messages and mission details. Descriptions of the gear she carries are displayed, as well as the layout of Croft Manor. Lara also uses the PDA like a diary, recording her thoughts of a particular mission.
The PDA is waterproof and can even accompany Lara on her long journeys through water.