This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
DOS 3.3 Dump is DOS 3.3 in an Apple II Text file. The purpose of the the dump file (dos33.dmp)is to make it possible for users without DOS 3.3 and without any Apple II telecom program to obtain DOS 3.3 from the net. Once you have DOS 3.3, you can obtain ADT and have a way to transfer 5.25" .dsk disk image files from your net computer to your Apple II. (And once you can transfer disk images, you can get a good Apple II telecom utility and have a way to transfer all kinds of files!) You can find DOS 3.3 Dump along with directions on several net sites. See Csa21MAIN4: Get It- Links to popular software packages. =============================