The scope of your application letter should include those things that are specific to obtaining your objective - convincing the reader to grant you an interview. You should be brief, but include such things as:
A specific job title
A desired area of employment
Source of job lead
Educational background
Work experience
Leadership activities
Specialized training
Remember, you are requesting an interview. Specify times at which you are available and the methods by which you can be contacted. In the sample application letter #1 the first paragraph states the writer's objective, the second contains background information and the third, his availability for an interview.