User of:

• Emacs
• Lisp
• Maxima CAS
• R
• SQL Server

Have contributed to:

• Programming language implementation (Lisp, Ada, Pascal, ...)
• Programming language design (Ada)
• Computer algebra system (Maxima CAS)
• Database/Web interfaces (Cache)
• Storage system management (EMC)
• Web search and crawling (Lycos, FAST)
• Enterprise search (FAST, GLG)
• Recommendations (GLG)
• Data quality (GLG)