1. Unix in Lisp
    Mount Unix system into Common Lisp image
  2. Unix shell scripting
    This is a guide for writing Unix shell scripts in various Common Lisp implementations
  3. unix-options
    unix-options is a library for processing Unix-style command-line arguments
  4. unix-opts
    This is a minimalistic parser of command line options
  5. Unlicense
    The Unlicense is a free public domain license
  6. URI
    Libraries for dealing with URIs
  7. uri-template
    uri-template is an implementation of the URI Template proposed standard draft version 01 as a
  8. url-rewrite
    URL-REWRITE programmatically rewrites (X)HTML documents such that certain attributes values are replaced by others
  9. userial
    A Common Lisp library for serializing to binary buffers
  10. USN Journal
    The USN Journal keeps track of changes made to files and directories on an NTFS volume