ERST - Evolutionary Reconstructions over Species Trees The package is developed for Windows and tested with the latest versions of Windows and Java Runtime Environment. How to download: The download page is 'http://www.dcs.bbk.ac.uk/~petar/ERST/ERSTdownload.html'. The package consists of a single 'jar' file, situated in a directory with the date of the revision in its name. ERST needs a single working directory, with rights to write in it. Ways to start ERST: 1. When already deployed in the working directory, click on the file. 2. Command line: When already deployed in the working directory, start it with the command 'java -jar ERST.jar' How to get help for ERST: 1. ERST contains a help menu with glossary of the terms, descriptions of the file formats and a tutorial about the basic proceedings. 2. Write to the corresponding author: petar@dcs.bbk.ac.uk. ERST creates two directories: 1. 'resources', which contains the starting example and some initial and current settings. 2. 'output', where 'shortReport.txt', 'hgTransferFile.txt' and 'altScenFile.txt' are of interest for the end user.