Java servlets were the first technology for producing dynamic Java web applications. Sun Microsystems released the first Java Servlet specification in 1997. Since then it has undergone tremendous change, making it more powerful and easing development more with each release. The 3.0 version was released as part of Java EE 6 in December 2009. Although not always used directly by Java web developers, servlets are at the base of all Java EE applications. Many developers use servlet frameworks such as Java Server Pages (JSP) and Java Server Faces (JSF), both of those technologies compile pages into Java servlets behind the scenes via the servlet container. That said, a fundamental knowledge of Java servlet technology is very useful for any Java web developer.