IBM System/370 Operator's Reference Manual page 10

Problem Determination
DEFINITION OF SYMBOLS USED IN FLOW CHARTS
(
)
<>
D
o
Starting or terminating step.
Question block which is asking for a "yes· no" or
"on - off" answer. Output lines will be labeled.
Indicates some action is required or gives a brief
description of situation.
Refers reader to some other page for di rections
of particular operator action required.
Number within this symbol indicates one of the
following:
1. Page number which references this page.
2. This page number, if this is a common
entry from several other
pages
3. Page to exit
to
in order
to
continue
usage of charts
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