This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
DOS 3.3 is the first DOS to be widely used on Apple II computers. Many
programs were written to use DOS 3.3 commands and saved on DOS 3.3 diskettes.
Apple 'officially' replaced DOS 3.3 with ProDOS back in the early '80's.
However, DOS 3.3 continues to be popular with II users. To get DOS 3.3 from the
net, see Csa21MAIN4: Get It- Links to popular software packages.
Another Apple II DOS is the one introduced with Apple Pascal. Compared to
DOS 3.3 or ProDOS, the Apple Pascal DOS is a very limited, cumbersome operating
system.
-------------------
 
Continue to: