IBM 3270 Manual page 43

If you have difficulty running Personal Computer
programs in your PC sessions, you may need
Program Information Files (PIFs) on the diskette
or fixed disk with the program. Contact your
supervisor or the person you call for help with
using your work station for more information
about PIFs. You can also read the IBM 3270 PC
Control Program Reference manual for
information about:
• Describing your application programs to the
system (Chapter 6).
What You Can Do If You Run Out
of Space in a PC Session
Once you start using a PC session, you may find
that it is not large enough.
Why You May Need More Space
Some programs may need more space than a
session has available.
Other programs run faster with extra space.
4-4 Book 3 - Using the Control Program