IBM 1130 User Manual page 471

Section
Subsections Page
60
10
I
30 01
Working Storage (WS)
Working Storage is used for temporary storage of
programs and data. Since it is used for this pur-
pose by both you and the Monitor, you should not
leave material in WS if you wish to use it later. If
you wish to retain a program or data file, it should
be transferred with DUP to either the User Area or
the Fixed Area, and given a name.
The size of WS is variable, since it consists of
whatever space on the disk is not taken up by the
other four areas.