HP -28S Manual page 30

5. Entry mode. The command line has three entry modes, each
suited to entering certain types of objects. Entry modes change auto-
matically as you key in objects, but sometimes you want manual
control; the
[f!J
key enables you to select the entry mode you want.
6. Command and unit listings (shifted). Press
.1
CATALOG
1
for a
listing of all HP-28S commands and their required arguments (page
31). Press
.1
UNITS
I
for a listing of the units recognized in unit conver-
sion (page 141).
7. Annunciators. The annunciators indicate the status of the calcu-
lator. When an annunciator is visible, it indicates the following:
Annunciator Meaning
0
Suspended program.
~
Shift key. was pressed.
a
Alpha entry mode.
(e))
Busy, not ready for input.
c=J
Low battery.
(27r)
Radians mode.
Q
Sending data to printer.
8. Command line. The text you key in goes in the command line.
9. Shift key. Press the colored shift key. to execute a command
printed in color above a key.
10. Enter command line. Press
I
ENTER
I
to process the text in the
command line.
11. Delimiter for symbolic objects. Delimiters are punctuation
that identify types of objects; symbolic objects are names and
algebraics. To key in a symbolic object, press
~
at the beginning and
(when necessary) the end of the object.
1: Getting Started 29
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