In scientific notation, 8E12 means 8 multiplied by 10 to the power of 12, which is equivalent to 8,000,000,000,000 or 8 trillion. This notation is commonly used to represent very large numbers in a concise format.
Input is when you type with the calculator
"Calculator"
clear
yes you mean calculator. yes a calculator is there in the computer.
What does 4e-6 mean
memory/recall
13.076
The calculator.
not a number
all clear
Grand total
If you mean the pocket calculator, it is actually a computer.If you mean something like the abacus, of course the computer came after it.