As shown in Figure 16.1, the data read from the keyboard are stored in variables. Variables
are created in RAM (type of primary memory). On applying the disk, I/O operations selected
or all variables created in RAM can be stored to secondary storage devices such as hard disks
or floppy disks. In Figure 16.1, the floppy disk is indicated. It is also possible to read data from
secondary storage devices. When data are read from such devices, they are placed in the RAM
and then, console I/O operations are used to transfer them to the screen. RAM is used to hold data
temporarily. The variables are used to store data during ...
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