What are Computers? 4
How Computers Developed 6
Different Designs 8
Data Processing 10
The Main Parts of a Computer 12
Combining the Parts 14
The Computer Code 16
'Reading' the Code 18
Recording Information on Magnetic Tape 20
Operation of Magnetic Tape Unit 22
'Writing'the Code 24
The Computer Store 26
'Words','Bits'and'Addresses' 28
The Magnetic Core Store 30
'Gates'and'Highways' 32
Computer Arithmetic 34
Binary Arithmetic 36
Programming 38
The Control Unit 40
Direct Access Stores 42
1．The Magnetic Drum 42
2．The Disc Store 44
The Output Unit 46
Does a Computer make Mistakes? 48
This Year,Next Year,Sometime...? 50
Vocabulary 52