sozluklerdeki nokta nokta dir dir dur olayi

wondows platformunda soyle bir olaydir;

bu nokta nokta olayi:
F:\Documents and Settings\revolter00>cd..

bu dir olayi:
F:\Documents and Settings>dir
Directory of F:\Documents and Settings

07/10/2008 07:31 PM <DIR> .
07/10/2008 07:31 PM <DIR> ..
08/12/2008 02:15 AM <DIR> Base
01/05/2008 03:14 PM <DIR> All Users
08/12/2008 02:15 AM <DIR> LogMeInRemoteUser
11/07/2008 06:20 PM <DIR> revolter00
0 File(s) 0 bytes
6 Dir(s) 6,601,400,320 bytes free

bu diger dir olayi:
F:\Documents and Settings>dir
Directory of F:\Documents and Settings

07/10/2008 07:31 PM <DIR> .
07/10/2008 07:31 PM <DIR> ..
08/12/2008 02:15 AM <DIR> Base
01/05/2008 03:14 PM <DIR> All Users
08/12/2008 02:15 AM <DIR> LogMeInRemoteUser
11/07/2008 06:20 PM <DIR> revolter00
0 File(s) 0 bytes
6 Dir(s) 6,601,400,320 bytes free

bu da dur olayi:
F:\Documents and Settings>dur
'dur' is not recognized as an internal or external command,
operable program or batch file.

**edit: windows o, takilmayin fazla.