EXHIBIT 99.6

                         [PEROTSYSTEMS(TM) LETTERHEAD]

9 February 1998

VIA FAX: 202/393-5760

Skadden, Arps, Slate, Meagher & Flom LLP
Attn: Martin R. Hoffman
1440 New York Avenue, N.W.
Washington, D.C. 20005-2111

Re: California Independent System Operator

Dear Marty:

On November 26, 1997, Perot Systems Corporation proposed to take certain steps
to address concerns raised by Mr. Jeffrey Tranen of the California independent
System Operator Corporation with respect to our consulting services. We have
not received a response to our letter, but wish to assure Mr. Tranen of our
continued commitment to act in an ethically responsible manner.

Accordingly, pending a complete resolution of the issues raised by Mr. Tranen,
Perot Systems will continue to use a disclaimer in its sales and marketing
presentations involving the California energy market deregulation that is
substantially similar to that proposed in our November 26, letter.

If you have any questions regarding this matter, please call me at 972/385-5615
at your earliest convenience.

Sincerely,

Charles N. Bell

cc:     Jeffrey D. Tranen
        California Independent System Operator Corporation

        Andy Goletz
        Ron Nash
        Ken Scott
        Ed Smith