A History of CLU - A retrospective by Barbara Liskov, the primary designer of CLU. [PDF] - http://www.lcs.mit.edu/publications/pubs/pdf/MIT-LCS-TR-561.pdf
Hello, World Program - Classic test program, written in CLU. - http://www2.latech.edu/~acm/helloworld/clu.html
CLU - Compiled, object-oriented language from Programming Methodology Group, MIT Laboratory for Computer Science. Home site: documents (definition, history) as PS files, FTP download links for native and portable versions. - http://www.pmg.lcs.mit.edu/CLU.html
clu2c - CLU to C compiler - http://www.din.or.jp/~ushijima//clu2c.html