SPSS
SPSS is both an interpreted, static-typed programming language and a propriety application used to run programs written in the SPSS language. PSPP is a free and open-source application that can alternatively be used to run programs written in the SPSS language, with some important discrepancies.
Contents
SPSS and PSPP
IBM has owned SPSS since version 16 and has done their best to erase older versions from history. IBM has also erased the headless mode of operation. Official support and online documentation is only available for versions 23 and later. Beyond that, a user manual in PDF format is distributed with the SPSS application.
PSPP is a GNU project to create a free and open-source application that can run programs written in the SPSS language. The PSPP project fully supports headless operation.
Data Model
Syntax