Answer:
The answer is "Data Entry".
Step-by-step explanation:
A computer system that includes two separate parts first server that offers services and a client who asks for it, this process is known as client-server system. This system provides many functions, like printing press function, in which a client request to printing then the printing press respond on its request.
In this question option "data entry" is defined, which is not a part of the client/server systems, because it is used to insert data only.