1. • How computers represent data
1.Binary Numbers
2.The Binary Number system
3.Bits and Bytes
All computer data is
converted to a series of
binary numbers 1 & 0.We
see a sentence as a
collection of letters,but the
computer sees each letter as
a collection 1s & 0s.

2. • A single unit of data is called a bit,having a value of 1
or 0.
• Work with collections of bits,grouping them to
represent larger pieces of data.
• Eight bits make up one biyte.
• We use a bit 0 or 1,to represent state.
8 bits = 1 bytes

3. We have
Decimal number system
Binary number system
Octal number system
Hexadecimal number system

5. Binary
Octal
Decimal
Hexadecimal
0000
0
0
0
0001
1
1
1
0010
2
2
2
0011
3
3
3
0100
4
4
4
0101
5
5
5
0110
6
6
6
0111
7
7
7
1000
10
8
8
1001
11
9
9
1010
12
10
A
1011
13
11
B
1100
14
12
C
1101
15
13
D
1110
16
14
E
1111
17
15
F