Most Common Wood Screws? In the fastener industry, near are millions of combinations - style of...

In the fastener industry, near are millions of combinations - style of head, length, pitch, threads per inch, determine...

Can someone with some experience contained by wood working, carpentry, or craftsmanship PLEASE describe me what the most common kinds/sizes of wood screw (or even machine screws/sheet metal screws) are?
Answers:    you once in a while see people using wood screw anymore, most people use drywall screw even for attaching wood, the only times empire use wood screws immediately are when the finished piece will show the screw heads. next a brass screw is used.
Surely not millions,