                                                           File:  RELEASE.TXT


                      LC50 Model System Release Notes


               Center for Exposure Assessment Modeling (CEAM)
     National Exposure Research Laboratory - Ecosystems Research Division
                  Office of Research and Development (ORD)
               U.S. Environmental Protection Agency (U.S. EPA)
                          960 College Station Road
                         Athens, Georgia 30605-2700

                                706/355-8400



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Corrections and Changes Between Versions 0.00 and 1.00:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- First release through CEAM: Monday, 11 January 1999.  Time: 09:21:16.

Summary:  

1)   Created LC50 model system and user support documentation files (refer to
     sub-directory README):

     READ.ME........LC50 model system general execution and user support
                    guide
     RELEASE.TXT....LC50 Model System Release Notes
     UPDATE.TXT.....LC50 Model System Update Notes
                    (Enhancements/updates/additions not covered in user
                    manual file)
     ABSTRACT.TXT...LC50 Model System Abstract
     RESPONSE.TXT...CEAM Software Product User Response Form
     YEAR2000.TXT...LC50 Model System Year 2000 (Y2K) Compliance Statement

2)   Composed INSTALIT/MediaBuilder code and logic for product version
     description (.PVD) and installation (.INF) script files.

3)   Composed Lahey FORTRAN MAKE utility (MAKEFILE) or DOS batch command
     file(s) for the LC50 model system FORTRAN source code.

4)   Compiled and linked executable task image program file for the LC50
     model, version 1.00, using Lahey FORTRAN 32-bit, protected mode compiler
     and Phar-lap linker.

5)   Included executable task image file (XLC50X.EXE) and run time support
     operating system programs and files.

6)   Included test output data file within the OUTPUT sub-directory to test
     installation of the LC50 model.

7)   Included the following LC50 run time support programs and files:

     SPEARMAN.BAT......LC50 model execution DOS command file
     LC50OPEN.SCR......LC50 model welcome screen file

8)   Application revisions to the LC50 model system, version 1.00, are
     included in the file UPDATE.TXT (LC50 Model System Update Notes).  This
     document is available as an ASCII text (non-binary) file in the README
     sub-directory.  Refer to file READ.ME in the README sub-directory for
     further information on the storage format and/or print/view requirements
     of this file.

9)   Included application users' manual "Trimmed Spearman-Karber Estimation
     of LC50 Values".  This document is available as an Adobe(*) Acrobat(*)
     Portable Document Format (PDF) file (USERMANU.PDF) within the DOCUMENT
     sub-directory if the user chose to install the user's manual from the
     INSTALLC.EXE program install menu.

     To view, print, and/or navigate a PDF document, a reader program must be
     installed on the users computer system.  A free Adobe reader allows the
     user to view, navigate, and/or print PDF files across all major
     computing platforms.  Acrobat Reader is a free viewing companion to
     Adobe Acrobat 3.0 and is available free from the Adobe world wide web
     (WWW) site at Uniform Resource Locator (URL) address:
     http://www.adobe.com.

     To ensure that the user can view and/or print a PDF file in its
     entirety, the user must down load and install the most recent
     version/edition of the free Acrobat Reader.  PDF files can be viewed
     across multiple platforms (Mac, Microcomputer, UNIX) using the
     appropriate reader for that platform.

     * Adobe, Acrobat, and Adobe Type Manager are trademarks of Adobe Systems
     Incorporated and may be registered in certain jurisdictions.
     (C) Copyright 1994 Adobe Systems Incorporated.  All rights reserved.

     Refer to file READ.ME in the README sub-directory for further
     information on the storage format and hardware and/or software
     print/view requirement(s) of the user's manual file.

10)  Summary of major scientific/application and/or operational changes:

     None as of Monday, 11 January 1999.  Time: 09:28:52. (release date).

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