This unit has introduced you to some aspects of using a scientific or graphics calculator. However, in many ways, it has only scratched the surface. Hopefully your calculator will be your friend throughout your study of mathematics and beyond. Like any friend, you will get to know it better and appreciate its advantages as you become more familiar with it. Don't expect to know everything at the beginning. You may find the instruction booklet, or other help facility, a bit hard going to begin with. Dip into it when you need it rather than ploughing through it early on. You may acquire other calculator friends, some of which may be computer calculators. They should help you with some tedious calculations and graph plotting, but they will not do the thinking for you and you will always need to think about the interpretation of their answers. They may stimulate you to think about the mathematics you are doing and hopefully enable you to enjoy it all the more.