How to write Bio-data?

Who else wants to learn the art of writing a perfect Bio-date? Here are few self-tested ways to do so. The present trend is slightly different. Mostly the applicants send a bio-data to the prospective employer along-with a Covering Letter. This Covering Letter may be as small as that of two-three sentences, but in the style of a formal letter. A few examples of such letters are given below: