Currently, the calculation program built into smart phones is not convenient for blind people. The invention patent allows the blind to view the touch screen as a large button and construct a computer program using the finite state machine theory. The blind person can input and complete all four operations by continuously clicking the touch screen.

一部傳統按鈕式的盲人計算機至少有18個以上的按鍵，包含了0到9的阿拉伯數字按鍵、四則運算子按鍵、開根號按鍵、小數點按鍵、歸零(Clear)按鍵與執行鍵(等號鍵)。雖然外加一個語音提示用的麥克風，但這種計算機的主要缺點在於按鍵太多。此發明專利讓盲人只需將觸控螢幕視為一個大按鈕並利用有限狀態機理論建構一電腦程式，盲啞人只需連續點擊觸控螢幕就可輸入並完成所有四則運算。

This invention uses all smart phones as the development platform including android (Android) and ios (Apple), and innovates to enlighten a "nested add-on input method" based on "finite state machine theory" to construct a computer program, this technology can be applied In all the communication products.