Terminal emulation
http://vt100.net/docs/vt100-ug/chapter3.html#DECSC

NFS
http://www.hn.edu.cn/book/NetWork/NetworkingBookshelf_2ndEd/nfs/ch14_02.htm

MySQL performance counters
http://www.mysql.com/news-and-events/newsletter/2004-01/a0000000301.html