Mitsubishi Electric Apricot XEN pentium, Owner'S Handbook Manual, Page: 124 / 147

A/8 XEN OWNER'S HANDBOOK
Inside your computer
Appendix A
If you think of the decimal system using columns:
1000 100 10 1
(10x10x10) (10x10) (10) (1)
The number 1019 is:
1000 100 10 1
1 0 1 9
Each time you add 1 to a column that contains 9, that column
goes back to 0 and you add 1 to the column to the left. The
columns represent powers of 10: 10x10, 10x10x10 and so on,
and the decimal system is said to be base 10.
The hex numbering system uses a base of 16. Hex numbering
works in exactly the same way as the decimal system, except
you must add 1 to a column that contains 15 before you add
1 to the column to the left.
As we have no single character to represent the numbers 10
to 15, we substitute the first six letters of the alphabet, so
that:
A represents 10
B represents 11
C represents 12
D represents 13
E represents 14
F represents 15
The example number 1019 can then be represented in hex
by:
4096 256 16 1
(16x16x16) (16x16) (16) (1)
0 3 F B