FRACSIM

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

FRACOP

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

TYPEFIN

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

TYPERAD

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

BHPRES

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

GASPROP

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

MULTIPT

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

ONEPT

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

OILTEST

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

FRACTEMP

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

TUBING

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

FOAMFRAC

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

ACIDFRAC

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

FRACDES

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

GASTEST

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.

PROPTRAN

Computer and Scientific

Owner

S.A. HOLDITCH & ASSOCIATES, INC.