1
WINDOWS
2
SOLARIS
3
UBUNTU
4
REDHAT
5
LINUX
6
MSDOS
7
UNIX
8
MAC
I
G
O
U
B
U
N
T
U
B
A
Q
K
U
M
F
A
N
T
O
Z
E
I
O
I
E
P
A
I
J
E
A
O
I
I
S
P
I
I
P
A
F
A
M
U
M
X
T
N
O
U
N
I
X
Z
M
S
C
A
A
S
R
X
F
X
I
O
R
W
S
V
T
O
J
E
V
Z
Y
A
F
O
E
B
X
L
E
X
D
W
A
U
O
D
M
I
U
A
K
U
H
H
O
F
J
N
S
I
H
R
O
N
K
T
A
M
Q
I
D
A
E
I
X
I
O
D
U
T
A
W
O
A
T
S
B
L
Z
H
L
N
O
C
S
Z
C