Here is a summary of the DOS floppy disk operations for the IBM PC-AT:

- To format a high-density (1.2 Mbyte) floppy for storing files:

	FORMAT A:

- To format a double-density (360Kbyte) floppy:

	FORMAT A: /4

- To copy a file from the hard disk to a formatted floppy:

	COPY C:FILENAME  A:

- To create a directory on the floppy:

	MKDIR A:\DIRECTORYNAME

- To copy all the files in one directory to another directory:

	COPY C:\DIRECTORYNAME A:\DIRECTORYNAME

- To copy a file from floppy to hard disk, changing its name:

	COPY A:\DIRECTORYNAME\FILENAME  C:\DIRECTORYNAME\FILENAME

- To backup a directory (and all subdirectories under it) onto a floppy:

	C:\ETC\BACKUP  C:\DIRECTORYNAME\*.*  A:/S

- To restore backed-up files to their original directories:

	C:\ETC\RESTORE A:  C:\*.* /S

- To restore only one particular directory:

	C:\ETC\RESTORE A:  C:\DIRECTORYNAME

- To restore only one particular file:

	C:\ETC\RESTORE A:  C:\DIRECTORYNAME\FILENAME