1) Data entry Box:
The [Enter] key is used to translate data from the entry box to stack first level. 2) Keyboard: 2.1) Basic Keyboard:
2.2) Extended Keyboard:
The extended keyboard has many pages. 3) Programmable keys:
This is an arch of programmable keys. 4) Stack:
5) Registers memory:
6) Variables memory:
7) Main program:
