When there are several AND or OR connectors, the AND conditions are evaluated first, as they appear in the statement, from left to right. Then the OR conditions are evaluated, also from left to right.

The clause IF A IS NOT POSITIVE is the same as the clause IF A IS NEGATIVE.

Condition names are always in Area B

Like all other level numbers, the condition name level number 88 also appears in the working-storage section of the data division.

An iteration will continue while the condition is false

Parenthesis don’t change the order in precedence.

An in-line perform never ends with an end-perform.

Condition names use level number 88 and appear in the working storage section.

When using Perform Until it is already known how many times the loop will execute

Can same Local data area (LDA) be used by many programs ?

A Subprogram can reference multiple PDAs?

subprograms and helproutines can have GDA

When a map is used to define a screen layout, a one line message area is automatically reserved

When you access an existing record or add a new one, you can obtain the ISN and use it subsequently to re-access the record

PERFORM can executes external & in-line subroutine both

FETCH causes the currently active module and all lower level modules to terminate and control to pass to the “fetched” program.