Design considerations

There are some design considerations that the application programmer should be aware of. These issues overlap, to some extent, the responsibilities of the application designer.

Program sharing in main storage
Virtual file access facility
You may have some data that is highly accessed, but only temporarily or intermittently. In this case, you would like to have fast access (requiring no I/O) to the data when it is needed, but you are reluctant to allocate the data to main storage permanently.
Program organization
Modular programming
Modular programming is the concept of dividing the problem solution into its logical parts or routines so that each part may be programmed independently.
Performance considerations
Ease of modification and expansion
Program commentary
Utility segments and subroutines
Miscellaneous programming tips

Parent topic: Application programming