Specialty Research is research that is only possible using a company of the appropriate industry type. Every unique type of company that is non-generic has, or will have, specialty research. Below are the categories of research, and if you follow through to the linked pages, you will see the research options available to them currently.
Notice: Research is very early in development. If a research item has a warning sign that says “Effects Non-Active”, it means that currently, you can research the item, but it will have no effect. This is still a good option if you have nothing else to research and want to get ahead for when it does go live!
Agriculture
Logistics
PMC
Manufacturing
Racing
Resource Acquisition
Retail
Shell Corporation