From: HUMAN RESOURCES
  To: ALL EMPLOYEES HOLDING OPTIONS
Date: MAY 25, 2006
  Re: 3 BUSINESS DAYS LEFT TO MAKE ELECTION IN VOLUNTARY EXCHANGE OFFER


The Voluntary Exchange Offer (VEO) is expected to close at midnight EDT on May
31, 2006. Time is running out. You have three business days left to make an
election in the VEO. If you have not yet made a decision about whether to
participate in the VEO, you may wish to call the VEO Information Line and speak
with an Ernst & Young representative about your individual option history. We
expect that call volumes to the VEO Information Line will continue to increase
each day through the end of the offer period and encourage you to call now. All
VEO materials can be downloaded at http://HR.CBS.com or on IKE at
https://ike.cbsradio.com.

The VEO Information Line is available from 9:00 a.m. EDT to 8:00 p.m. EDT,
Monday through Friday (excluding Memorial Day), during the offer period and can
be reached toll-free at (800) 259-3638 or (201) 872-5800 from an international
location. On May 31, the VEO Information Line will be available until midnight
EDT FOR THE RECORDING OF ELECTIONS ONLY. Ernst & Young representatives will be
available to discuss your personal situation with you until 8:00 PM EDT on May
31.


LEGAL NOTICE
CBS Corporation ("CBS") has commenced the Voluntary Exchange Offer to which this
communication pertains. Holders of CBS stock options are strongly advised to
read the Offer to Exchange filed on Schedule TO (Tender Offer) and the other
documents related to the Voluntary Exchange Offer filed with the Securities and
Exchange Commission because they contain important information. Holders of CBS
stock options may obtain copies of these documents for free at the Securities
and Exchange Commission website at www.sec.gov or from CBS's Human Resources
department.