Analog computers versus digital computers

Analog computers
Examples:
1 + 11 = 111
😎 + 😎😎 = 😎😎😎
Notes:
Analog computers use continuous values: many possible values.
Quantities after operations among physical numbers represented by physical numbers.

Digital computers
Examples:
1 + 10 = 11
1 + 2 = 3
where
1 symbolizes bit number one
10 symbolizes bit number two
11 symbolizes bit number three
Notes:
One of the most fundamentals of digital computers is that they can use the bare minimum of two discrete values: zero and one.
Quantities after operations among symbols represented by symbols.