This is a very simple demo of typesetting via a browser. The result file looks like a word processing file, but it's actually typeset. Try typing AV and ffi, and then type the same in Word, and compare the results carefully. You will find the f touches the i. You will also find that a straight vertical line can not be drawn between the A and the V. While these are small points, when all the differences between word processing and typesetting are demonstrated, you will see quickly the superiority of typesetting.