The "brain" of the device, assembled with electronic components (PCBA).
The physical housing (made of metal, plastic, etc.) that protects the internal components and gives the product its structure and form factor.
Intricate networks of wires that connect various components and sub-assemblies, enabling power and data transfer.
Pre-built modules like power supplies, displays, user interfaces (buttons, touchscreens), or control panels that are integrated into the final product
The necessary software or operating system is often installed and configured during the assembly process.