* Register based VM vs. Stack based VM
 * 참고 : [http://shape-of-code.coding-guidelines.com/2009/09/17/register-vs-stack-based-vms/ register-vs-stack-based-vms]

* [http://docs.oracle.com/javase/specs/jvms/se7/jvms7.pdf JVM7 specification pdf]

== 다음 시간(7월 12일) ==
 * scope
 * declaration
 * identifier
 * symbol lookup
 * scanner, parser(table lookup)
 * 수식 계산을 stack based instruction(jvm spec 참고) 으로 구현