LinkWinds 2.1 Release The new LinkWinds, version 2.1, is ready for release. For those unfamiliar with LinkWinds, a brief description is below. The software executes only on SGI platforms under IRIX 4 or IRIX 5. An alpha-test build for the Sun workstation running under Solaris 2.4 is also available. It contains the 2- dimensional subset of LinkWinds applications only. The Linked Windows Interactive Data System (LinkWinds) is a visual data exploration system which has served as a testbed and prototyping environment for a NASA/JPL program of research into graphical methods for rapidly and interactively accessing, displaying and analyzing large multivariate multidisciplinary datasets. It provides a variety of functions and services, including interactive 2- dimensional and 3-dimensional graphical displays of data, hard copy of graphical displays and text, interactive color manipulation, animation creation and display, data subsetting either at the input or output, a journal and macro capability, context-sensitive help, and network support for data search and retrieval as well as collaborative data analysis. It is an integrated multi- application execution environment, running under UNIX, with a full graphical user interface (GUI). The system has several facilities for database access and provides for the ingestion of very large data files in a variety of database formats. Data formats currently accepted are: 1) Raw binary integer (1 - 4 byte) and floating point (4, 8 byte) data. 2) The Hierarchical Data Format (HDF). 3) The Common Data Format (CDF). 4) NetCDF. 5) The Silicon Graphics, Inc. native RGB image format. 6) Data with Planetary Data System (PDS) headers. 7) The astrophysics Flexible Image Transport System (FITS). Various LinkWinds packages are available via anonymous ftp from: twinky.jpl.nasa.gov in the /pub/LinkWinds directory. YOU MUST MAKE THE TRANSFER IN BINARY MODE.