Commodore PC Ms-Dos 3.2 User's Manual page 216

1144 MS-DOS User's Reference
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Append
Purpose:
Adds a specified number of lines from your disk to the file being
edited in memory.
Syntax:
Comments:
The n option specifies the number of lines that you want to read
into memory. You need this command only if the file you want to \ J
edit is too large to fit into memory. When you start edlin, it reads
as many lines as possible into memory.
To edit the remainder of the file that will not fit into memory, I)
you must write lines that you have already edited onto your disk.
Then you can load unedited lines from your disk into memory by
using the A (append) command. Refer to the W (write) command < j
in this chapter for information on how to write edited lines to ^^
your disk.
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Note If you do not specify the number of lines to append, edlin
adds lines to the available memory until it is 3/4 full, but does
nothing if available memory is already 3/4 full. ( )
After the A command reads the last line of the file into memory,
edlin displays the message "End of input file/'
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