need a command to specifically to check the manufacturer of the operating system for soalris machine....this doubt sounds silly but i am just looking for specific command which will give me the manufacturer for soalris. 
can we use
uname -s
as the manufacturer of the OS..i guess manufacturer will be Oracle corporation
can someone help in getting this.
From
man uname
-s Prints the name of the operating system.
This is the default.
As you can see this has nothing to do with manufacturer.
If you are eager to see manufacturers name do it in this way:
cat /etc/release
Solaris 10 10/09 s10x_u8wos_08a X86
Copyright 2009 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 16 September 2009
Here is the same output from /etc/release on newer machine.
Oracle Solaris 11.1 SPARC
Copyright (c) 1983, 2012, Oracle and/or its affiliates. All rights reserved.
Assembled 19 September 2012