CMC : Central management console. It manages & maintain all
server groups. It must & should enables all 28 servers or
services. then otherwise webi,cms ..etc products are not
working. at that time only designer & Deski working. so, u
must enables all servers in cmc .

CMs : central management server. It creates users, groups &
server group settings. It also maintain the security levels
also. In xir2 supervisor + BCA combining in CMS. here
distributing & shceduling docs directly.It is just like
admin for all other users or groups. It creates & manages
the folders & Categories.

I think you swapped the difnition

The Central Management Console (CMC) is included for full 
control over the BI
platform. In addition, specialized administration 
interfaces are provided when you
require administration of specific-user access, document 
creation, and server
configuration. This is particularly important in 
decentralized system management
environments where different people are responsible for 
different aspects of the
deployment. The result is a powerful, open, and complete BI 
platform that meets
the needs of end users while providing IT with full control 
over the deployment.

The Central Management Server (CMS) is the central platform 
service and is
responsible for maintaining a database of information about 
your BusinessObjects
Enterprise XI system. All the platform services are managed 
and controlled by the
CMS. The CMS also manages access to the system file store 
where the physical
documents are actually managed. The system repository 
database is maintained
using the provided MySQL database, or by using your 
preferred IBM DB2,
Microsoft SQL Server, Oracle database, or Sybase ASE . The 
database structure
is automatically created when you set up your 
BusinessObjects Enterprise XI
system or it can be configured on a different database if 
you want to move your
implementation to another environment. All access to the 
repository is managed
directly by the platform and management interfaces and by 
the SDKs.
The CMS data includes information about users and groups, 
security levels,
BusinessObjects Enterprise content, and services. The CMS 
also maintains the
BusinessObjects Enterprise repository, and a separate audit 
database of information
about user actions.