Black and white calculator device.
Schlüsselwörter
calculating machine,
device,
black,
white,
numeric,
computer keyboard,
mathematic,
calculation,
number,
buttons,
electronic,
tool,
office,
school,
finance,
accounting,
arithmetic,
computing,
digit,
entry,
input,
operation,
mathematic,
equation,
solution,
result,
process,
datum,
filed,
memory,
storage,
summing,
subtract,
multiply,
divide,
percentage,
equal,
clear,
memorise,
digit,
signs,
symbol,
keyboard,
appliance,
machine
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