Smartphone screen showing a digital calculator app with numeric keypad and functional buttons.
Schlüsselwörter
digital,
calculating machine,
app,
interface,
smartphone,
device,
screen,
numeric,
computer keyboard,
touch,
technology,
tool,
application,
mobile,
calculation,
touch screen,
buttons,
display,
number,
input,
electronic,
feature,
contraption,
operation,
portable,
software,
utility,
zero,
modern
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