Before activation (trial version). Download and install the software. Then open one of the sample files and generate several analyses. Or try typing in and analyzing one of your own samples. See how easy the software is to use and how much great data you can pull out of a language sample. The trial version of the software is identical to the purchased/activated versions except that analysis and error checking are limited to the first 15 utterances.
After activation (full version). When you purchase the software, you receive a product key which is used to convert the trial version to the full version. Specific licensing (Clinical, Student, Instructional, or Research) is determined during the activation process.
Download the latest service pack for SALT 20, SALT 18, or SALT 16.