ATARI FujiNet has the N: handler. It also has the N tools. They serve the same functions, and this video attempts to explain why we need both.
Index:
00:00 The DOS folder
01:10 What happens when you try to use N: in DOS 2.0 DUP?
04:40 DOS 2.0...What happens when you try to go back to BASIC without MEM.SAV?
05:20 Creating MEM.SAV so we can preserve the handler for BASIC and other applications.
07:45 The N tools
10:20 using NCOPY to copy from the network, to a floppy.
12:00 using NCOPY to copy from a floppy, to the network.
14:30 using NLOAD to load Cyclod on DOS 2.
15:30 Comparing to MYDOS 4.53
16:40 comparing Viewing directory via the N: device
16:58 comparing Copying via the N: device
17:55 Whoops! can't load a binary file in MYDOS via the N: device.
19:08 Loading binary file with NLOAD.
19:55 Using N tools in SpartaDOS X