Database access
- What we've been studying.
- Although database access now tends to be on demand, for individual
items, not all items processed in a batch.
Business logic
- Application requirements determine how data should be
transformed from the old state to the new state.
Presentation logic
- The udpated inventory report is carefully formatted.
- Programming languages of the era (FORTRAN, COBOL, PL/1) had extensive
features for controlling the output of pure text reports.