Order by alphabet and then by numbers

Question

I have records like

 A5
 A4
 Z1
 B2
 C7
 C1A
 C11A
 B1
 B4

I want them to be sorted in this manner

A4
A5
B1
B2
B4
C1
C11A
C7
Z1

using the ORDER BY clause.

I want them to be sorted by alphabets and then by numeric values.