Making a bootable diskette in MS-DOS or PC-DOS

In MS-DOS or PC-DOS, how do I make a bootable diskette?

To create a bootable diskette, insert a disk in the A or B drive, and use the following command at the C prompt:
format a: /s
(or format b: /s if formatting the diskette on drive B.)
To create a diskette you can use to boot up the computer in case of an emergency, copy the following files onto the floppy from C:\DOS (or C:\WINDOWS\COMMAND in the case of Windows 95).
format.exe sys.com fdisk.exe himem.sys emm386.exe edit.exe (MS-DOS 6.x and Windows 95)
On this emergency diskette, create files called autoexec.bat and config.sys with the following contents:
· autoexec.bat
echo off prompt
· config.sys
device=himem.sys device=emm386.exe /noems dos=high
You should make the emergency disk on the same computer it may be used on. This will avoid the problems caused by booting up the computer with a different version of DOS than that which is on the hard drive. In addition, you should scan for viruses before creating the diskette.