DOS 3.3 was the primary Disk Operating System used by early Apple ][ systems and was designed to run on 143k 5.25" disks only.
ProDOS is a descendant of the Apple /// SOS system and offers considerable improvements over DOS 3.3 in the areas of file management, mass storage support, performance and reliability.
You might want to visit this site for more information about the Apple // series:
DOS 3.3 was the primary Disk Operating System used by early Apple ][ systems and was designed to run on 143k 5.25" disks only.
ProDOS is a descendant of the Apple /// SOS system and offers considerable improvements over DOS 3.3 in the areas of file management, mass storage support, performance and reliability.
You might want to visit this site for more information about the Apple // series:
http://home.swbell.net/rubywand/A2FAQs1START.html
I only use DOS 3.3 for some old game disks and utils.
All my newer applications, utils etc. are ProDOS - mostly because I use a CFFA card.