>>418785481
The intricacies of the windows and linux kernel are not my expertise but I rely on their syscalls to do even basic operations. Then people build libraries on that to perform more advanced operations, like networking. Then that is built on to drive HTTP, and so on and so forth.
Petrochemicals, metallurgy, engineering, bioscience, genetic manipulation, etc etc all go into a simple bit of agriculture, and I just build on that by buying bread. (Sometimes I buy flour)