Difference between Computer Science and Information Technology

I just found the answer.Simple explanation from my senior

"lets compare computer n cars. In automotive engineering, we study how the engine is functioning, why the engine rotate faster when we press the gas, etc. In cs, we study how the computer functions, how the data is processed in processor, how it is stored in memory, how to create an efficient algorithm to process the data, etc. Back to cars term, let says we are managing transportation service. We have bus as the tranportation service. At same time, we have to manage the bus route, schedule, maintenance of the bus to ensure the smoothness of service. In IT, we also providing the services using computer. Like for example, in the course registration system, we have to manage the database, the interface, the networking, etc. Also they have to do the maintenance for the system"