ORDER BY Problem...

Hello...

Why does Postgresql order the uppercase letters first?

I have e.g. a table with one row an in this row there are follow values:

row1
----
ADC
aa
ABC

With this select-syntax 

select * from table order by row1

I become this output

ABC
ADC
aa

but I want this ouptut:

aa
ABC
ADC

What do I wrong?

-- 
Gruss: Severin Olloz