BROOKHAVEN NATIONAL LABORATORY
                                 MEMORANDUM





Date:    31 July 2012
To:      ISAJET Users
From:    H. Baer, F.E. Paige, S.D. Protopopescu, X. Tata
Subject: ISAJET 7.83



ISAJET 7.83 is now available.

Isajet 7.83 contains four changes. 

1. The branching fraction $BF(B_u\rightarrow\tau\nu_\tau )$ is calculated
at tree level and output in IsaTools.

2. Previous versions could generate negative squared masses for third 
generation sfermions. The current version stops the calculation and
outputs an error message.

3. The percent electroweak fine-tuning is now output from Isasugra.
The effective potential calculation includes some small contributions from
$W$, $Z$ and $H^\pm$. Thanks to A. Mustafayev for help.

4. The Isasusy mass spectrum output has been improved so that it is similar to
the Isasugra output.