Data Representation
Computers are Electronic Machines
 The electric current in any given location is
high or
low.
 We can simplify that to
on or
off.
 So, all data in a computer
— numbers, letters, pictures, programs: it's all
just
high and
low current.

 Given that, how do we represent numbers?
 Use the binary number system, which is just
0's and
1's.
Alyce Brady, Kalamazoo College