The correct answer is: D. manual operation symbols
A systems flowchart is a graphical representation of the steps involved in a business process. It is used to document the flow of data and information through a system, as well as the relationships between the different components of the system.
The online manual keeping of input data is identified by using the manual operation symbol. This symbol is a rectangle with a curved top and a diagonal line through it. It is used to represent any manual task that is performed as part of a system.
The online storage symbol is a square with a diagonal line through it. It is used to represent any online storage device, such as a hard drive or a database.
The online keyboard symbol is a rectangle with a keyboard inside it. It is used to represent any online input device, such as a keyboard or a mouse.
The keeping operation symbol is a rectangle with a curved top and a diagonal line through it. It is used to represent any manual task that is performed as part of a system.
None of the above is not the correct answer.