In 1977, a graduate student in the computer science department named Bill Joy (MS 1982) assembled the original Berkeley Software Distribution, commonly known as BSD Unix. Joy, who went on to co-found Sun Microsystems, also developed the original version of the terminal console editor vi, while Ken Arnold (BA 1985) created Curses, a terminal control library for Unix-like systems that enables the construction of text user interface (TUI) applications. Working alongside Joy at Berkeley were undergraduates William Jolitz (BS 1997) and his future wife Lynne Jolitz (BA 1989), who together created 386BSD, a version of BSD Unix that runs on Intel CPUs and evolved into the BSD family of free operating systems and the Darwin operating system underlying Apple Mac OS X. Eric Allman (BS 1977, MS 1980) created SendMail, a Unix mail transfer agent that delivers about 12 percent of the email in the world.