Hardware

Parts

Off-the-shelf, premade components

	Has Description
Batteries	Rechargeable and not, storage of power
Cameras	Digital video cameras, webcams, etc.
Computers	Computers and computer parts, including single-board computers, microprocessors, and individual computer components like graphics cards, Raspberry Pi HATs, etc.
Fluids	Tubing and reservoirs and materials for managing liquids
Passive Components	Passive electronic components like resistors, transistors, solenoids, and so on
Speakers	Loudspeakers, passive and active
Structural	Parts for building things, supporting structures, latches, hinges, etc.

Schematics

DIY print, engrave, or fab your own

	Has Description
2D CAD	Flat schematics like those for laser engravings and layouts
3D CAD	Mesh schematics like 3d-printable parts and assembled component files
PCBs	Printed circuit boards (and all other circuit schematics, even nonprinted ones)

Materials

Raw materials, or generic items that don't need their own page (eg. all the different sizes of screws)

	Has Description
Adhesives
Fasteners	Hardware for connecting things, like screws, brackets, and latches
Metal
Wood

Tools

	Has Description
Instruments	Standalone instruments