IBM 1130 User Manual page 432

INTRODUCTION
For each application, there will come a day when all
your programs are written and tested, and you will
be ready to convert from your old system to the new.
Section Subsections Page
40
01
I
00
01
Will you be ready? Not unless you have planned
and prepared for conversion. Conversion involves
three major elements, of which the conversion it-
se If is the last step.