COBOL
Read two sorted files and merge them into one sorted output file....
file
merge
sort
algorithm
COBOL
Update master file with transactions: A=Add, U=Update, D=Delete. Both files sorted by key....
file
master
transaction
batch
COBOL
Use REPORT WRITER to generate formatted report....
report
formatting
output
COBOL
Generate report with control breaks (subtotals by group)....
control-break
subtotal
report