Almost all companies work like this.
Take lockhead martin for example, they make f22s, they're quite famous I'm sure u have heard of em.
They actually don't make all the parts themselves, they just do some key parts and software. They are basically a platform integrator.
Check this out f 22 has over 150 individual component suppliers.
www.airframer.com
The reason is very simple no one comapny can make every bolt to radar and engine of the plane.
Same thing applies to the electronic hardware Industy.
A Lenovo's laptops Cabinet and LCD is the only thing manufactured by them. Ram and memory is from Samsung, processor is from intel. Indivisual chipset is from different semiconductor companies. Battery Raw materials is from different company.
This is what Socialism and communism fails to understand, they think governments can be teh end all be all. The government can grow food to build rockets to sew cloths and everything imaginable.