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-This is IMM, a program to send and receive images using IP multicast.
-This program is currently in use on the MBONE to transmit semi-real-time
-weather satellite images, as well as a number of other miscellaneous
-pictures. IMM requires X11R6 and either `xli' or `xv' to perform the
-actual image display.
+IMM has been designed to efficiently replicate files/file directories
+using a reliable dissemination protocol framework and provide archiving
+and post processing features. The default mode of operation is for imm
+to receive and display compressed imagery files (e.g., jpg,gif) using
+xv or xloadimage as a post processor.
+
+This release includes an sdr plug-in, named sdr2.plugin.S53.image.imm,
+which must be installed to participate in MBone alpha testing of imm sessions.
+Usually in a directory called ~home/.sdr/plugins to be found by sdr.
+See the sdr help pages for information on installing plugins.