NRAO supports the AIPS (Astronomical Image Processing System) software as its primary data-analysis package for the VLA. This portable package may be run under various flavors of Linux or Unix operating systems, as well as Mac-OS. Most observers install and use the software on their desktop computers and/or laptops to reduce their VLA data. See http://www.aoc.nrao.edu/aips/ for more details.
NRAO is presently developing the CASA (Common Astronomy Software Applications) package, primarily for data analysis using the EVLA and ALMA. CASA is expected to be available with some user features in 2007, and as a more complete user package in 2008. See http://casa.nrao.edu for more information.