I have nice binding of minilzo to Gambit. Minilzo is very high speed compressor/decompressor by Markus Franz Xaver Johannes Oberhumer (http://www.oberhumer.com/opensource/lzo/). Last night I wrote a simple binding to it. Its speed so high that allows of compression/decompression of many things in programs on the fly. Sources attached to this letter. Compilation of module: gsc lzo.scm It is possible to built-in it in Gambit. Just put sources in Gambits sources lib directory and make appropriate changes in makefile and makefile.in (add lzo.scm, lzo.c and lzo.o to corresponding sections).