http://en.wikipedia.org/wiki/List_of_DOS_commands

http://www.computerhope.com/msdos.htm

http://www.computerhope.com/overview.htm

http://www.dewassoc.com/support/msdos/dos_commands.htm

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/dos_cmds.mspx

http://en.wikipedia.org/wiki/MS-DOS

http://www.escotal.com/doscommands.html

http://academic1.bellevue.edu/dostutor/part_2.html

http://www.tnd.com/camosun/elex130/dostutor1.html

http://www.colorado.edu/geography/gcraft/tips/doshelp.html

http://faculty.kc.devry.edu/twheeler/comp125/dos.pdf

http://people.uncw.edu/pattersone/121/labs/L1_MSDOS_Commands.pdf

http://www.easydos.com/dosindex.html

http://www.ee.usyd.edu.au/tutorials_online/topics/itopics/dos-cmds.html

http://www.bellevuelinux.org/ms-dos.html

http://www.thelenchannel.com/1dos.php

http://www.computing.net/answers/dos/dos-commands/6216.html

http://elsa.berkeley.edu/sst/basic.dos.html

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/dos_diffs.mspx

http://mirror.href.com/thestarman/DOS/DOS7NET.htm