CHARLESBABBAGE
ELECTRICITY
BINARYCODES
TRANSISTOR
PUNCHCARDS
MICROCHIP
APPLE1
APPLE2
ABACUS
ENIAC
BULB
IBM
CPU
A
U
O
Q
H
H
R
O
T
S
I
S
N
A
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T
A
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P
O
E
W
S
W
K
I
L
S
T
C
W
A
K
F
F
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T
G
D
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A
C
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W
C
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2
C
B
T
B
U
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A
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A
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A
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A
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Y
Y
Z
A
W
A
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A
D
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I
I
I
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T
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C
C
N
A
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H
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C
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L
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U
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I
N
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A
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1
O
L
S
A
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C
B
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T
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T
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Y
W
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B
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C
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C
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G
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W
E
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C
O
J
O
Y
Q
G
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