4 ADDENDUM NUMBER TWO TO FOURTH BERKELEY SOFTWARE DISTRIBUTION LICENSE (4/86) AGREEMENT BETWEEN THE REGENTS OF THE UNIVERSITY OF CALIFORNIA AND THE LICENSEE

The above-referenced License Agreement (``Agreement'') entered into between The Regents of the University of California (``Regents'') and the below-named Licensee controls Licensee's use of release 4.3 of Regents' Fourth Berkeley Software Distribution (``4BSD'') which was distributed upon execution of the Agreement. Pursuant to the provisions of Article 2, ``Fees,'' of the Agreement, release 4.4BSD alpha of 4BSD, which is an update of release 4.3, is hereby made available to Licensee under the same terms and conditions set forth in the Agreement, except that the distribution fee for release 4.4BSD alpha is four hundred dollars ($400.00).

(1) Purpose of this release

A source code copy of the 4.4BSD alpha release software (``Code'') is being provided to Licensee so that Licensee can assist the Computer Systems Research Group (``CSRG'') at The University of California at Berkeley in its development and release engineering efforts.

(2) Restrictions on distribution of this release

In addition to the terms of the 4.3BSD License Agreement, other than as expressly provided in this Addendum, the use of the Code is further restricted to internal non-commercial use only. Licensee may make the Code available to other organizations that are assisting Licensee in the alpha testing, provided that those organizations have appropriate AT&T source licenses, agree to use the Code only for their own internal use, and do not distribute the Code or binaries derived from the Code in their own products. The provisions of this Clause 2 shall automatically terminate as of the date the Regents make 4.4BSD generally available, but in no event later than August 1, 1990. The other terms of this Addendum and the 4BSD License Agreement shall remain in effect.

(3) Reporting requirements and external code releases

Licensee commits to supply CSRG with bug reports and fixes to the Code from its own organization and those that it receives from those organizations that are participating with Licensee in this alpha test release. Notwithstanding the provision of Clause 2 above, the Code may be used in the development of a product to be externally released by Licensee and the participating organizations, provided that such external release is not made prior to August 1, 1990 and further provided that prior to any such external release being made, any portions of the Code or binaries derived from the Code to be externally released are upgraded to the same level as the code made generally available by Berkeley as of June 30, 1990.

All code from the Berkeley releases available as of June 30, 1990 used in the development of an external release must be upgraded to the same level as the code in the final 4.4BSD release for any external releases of its product made by Licensee or any participating organization no later than the next general release of such product.

IN WITNESS WHEREOF, Regents and Licensee have executed this Amendment Number Two on the dates specified below. The effective date of this amendment shall be the date of execution by Regents.