HP 35s Scientific Calculator - Manual (Page 28)

1-12 Getting Started
The Display and Annunciators
The display comprises two lines and annunciators.
Entries with more than 14 characters will scroll to the left. During input, the entry is
displayed in the first line in ALG mode and the second line in RPN mode. Every
calculation is displayed in up to 14 digits, including an
 sign (exponent), and
exponent value up to three digits.
The symbols on the display, shown in the above figure, are called annunciators.
Each one has a special significance when it appears in the display.
First Line
Second Line
Annunciators