Because only one menu at a time could be placed on the screen and because software at that time was still heavily influenced by the batch style of mainframe computing, the hierarchical menu paradigm was sequential in behavior.

• 因为屏幕一次只能显示一个菜单，另外那时的软件仍然严重地受到大型机批处理风格的影响，所以层次关系菜单范例在行为上是顺序的。