PREFACE TO THE FIRST EDITION 5
PREFACE TO THE SECOND EDITION 8
PREFACE TO THE THIRD EDITION 9
ACKNOWLEDGEMENTS 10
LIST OF GENERAL ARTIES 11
A NOTE ON SPELLING 13
INTRODUCTION TO COMPUTERS 14
A 23
B 47
C 66
D 112
E 163
F 181
G 206
H 211
I 221
J 259
K 261
L 263
M 281
N 316
O 327
P 341
Q 375
R 377
S 398
T 442
U 467
V 475
W 481
X 485
Y 486
Z 487