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
1's and
0's.
 How
do we represent letters, punctuation, and other characters?
Alyce Brady, Kalamazoo College