How do computers represent information?
Decimals
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
binary digit = bit
8 bits = 1 byte
American Standard Code for Information Interchange
ASCII A-Z
| A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
| 65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 |
74 |
75 |
76 |
77 |
|
| N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
| 78 |
79 |
80 |
81 |
82 |
83 |
84 |
85 |
86 |
87 |
88 |
89 |
90 |
ASCII A-Z
| A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
| 65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 |
74 |
75 |
76 |
77 |
|
| N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
| 78 |
79 |
80 |
81 |
82 |
83 |
84 |
85 |
86 |
87 |
88 |
89 |
90 |
| 128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
ASCII A-Z
| A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
| 65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 |
74 |
75 |
76 |
77 |
|
| N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
| 78 |
79 |
80 |
81 |
82 |
83 |
84 |
85 |
86 |
87 |
88 |
89 |
90 |
| 128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
ASCII A-Z
| A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
| 65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 |
74 |
75 |
76 |
77 |
|
| N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
| 78 |
79 |
80 |
81 |
82 |
83 |
84 |
85 |
86 |
87 |
88 |
89 |
90 |
| 128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
How should I get to class?
- Walk
- Ride bike
- Take public transport
- Take taxi
Lets find the word "operation" in the dictionary
Class Culture
CS110 - Fall 2018 - Introduction to Computer Science
Welcome to CS110
2016
2017
2017
