Weapons, components, blueprints, and resources. Warframes live under Warframes, not Inventory.
Primary weapons — guides, attack modes, Foundry trees, and mods.
Secondary weapons — guides, attack modes, Foundry trees, and mods.
Melee weapons — guides, stance-friendly stats, Foundry trees, and mods.
Neuroptics, Chassis, Systems, and other build parts.
Crafting resources used in Foundry recipes.