Section 2: Display Control 34
Engineering Notation Display
Engineering notation is similar to scientific notation except that engineering notation shows all exponents as multiples of three (e.g., 103, 10–6, 1012).

 Specified significant digits after the first one

 Sign
– 12.345678 – 09
 Exponent of 10 always a multiple of three

 One significant digit always present Sign of exponent of 10

This is particularly useful in scientific and engineering calculations, where units of measure are often specified in multiples of three. Refer to the prefix chart below.

Multiplier Prefix Symbol
 1012 109 106 103 10–3 10–6 10–9 10–12 10–15 10–18
 tera giga mega kilo milli micro nano pico femto atto
 T G M k m µ n p f a

Engineering notation is selected by pressing g ENG followed by a number key. The first significant digit is always present in the display, and the number key specifies the number of additional significant digits to which the display is rounded. The decimal point always appears in the display. For example, key in 28.17939 × 10 –16 and change the number of significant digits displayed to see what happens to the number. Remember that the HP-41C prompts you (with ENG _) for the number of significant digits.
Keystrokes Display
28.17939  28.17939 _
EEX CHS 16
 28.1794 –16
The number.