Remembers data collected for later use. Now you can record data in the field and wait to make your final calculations until convenient. The calculators become handy notebooks to save data from previous problems for later use or keep the sum of statistical data entries while taking samples on location. Surveyors doing traverses in the field can keep intermediate results even while the calculators are switched off between readings. Engineers and students can keep often-used conversion constants at their fingertips.
Merged keystrokes provide greater memory efficiency.
Both calculators may be operated on batteries alone or from a convenient electrical outlet while batteries are being recharged. Battery operating time is significantly extended since the calculators may be switched off between calculations without losing programs or data. When batteries are removed, a capacitor temporarily furnishes power to the C-MOS circuits. The time available for the exchange varies depending on the charge of the battery being replaced. HP-19C's quiet thermal printer lists your programs or data.