If you see a file lagoon-X.Yz.tar.gz, where X, Y are numbers and z is a character (for example, 0.11a), it is a prerelease of Lagoon version X.Y. This prerelease probably has some bug fixes for version X.Y-1 but may not have been tested extensively. Ahem. What is Lagoon? This directory contains both the original Mosaic-2.1 and the version from TUE, with added "fish search". This search works by searching documents for keywords, finding new documents by following links recursively. For long searches on remote document spaces, this is costly: it takes a lot of tour time, and worse, it take a lot of network resources. The same is true for regularly visited remote documents, such as online help documents: having to retrieve them over and . Therefore, we advise you to install some kind of caching facility for documents. One option is to run a local WWW server, and use it to 'mirror' remote documents. This requires quite some disk space on the server side. The best is to mirror documents only when they are requested, not in advance. The file lagoon-0.15.tar.gz contains a simple server script to do just that. It is very crude, but we already found it indispensible for series of costly fish searches. Lagoon is now known to work on SunOS 4 and Solaris 2 on several platforms. (Prior versions did not work on most machines.) Lagoon is completely separate from Mosaic, and its benefits are not limited to speeding up the fish search. For example, you can use Lagoon to build a local mirror of part of the WWW in a server installed on your own machine, then use the machine for a standalone demonstration. Enjoy! Mail comments and bugs to reinpost@win.tue.nl.