1. A piece of software in a computing enviroment.

2. A (legal) form which contains data required to obtain or to inform. eg; to apply for a job, ...

As in the form/document, either on paper, or electronic.
Applications are dreaded tools used to measure the abilities of a person. Generally biased, these applications are filled out be the person who is the subject of these talent measurements.
Applications can include those for work, college/grad school, and the much mocked, match-making websites.
Things to put on a college application:
Grades.
Avoid the inclusion of those below average, and any grade below an A. If you only have one A in your high school career, have the decency to pretend you have others. Remember, high GPA's look good.

References.
If you are an a-hole of a student, don't get a reference from a teacher. Pick up a few pieces of garbage while the janitor is watching, and have him recommend you. Maybe bribe him, but no more that 5 dollars. That would be tacky.
Test Scores.
Don't take the tests, just write down whatever you feel like. Don't score yourself too high, for most people, a 300 on the SAT is enough of a stretch. It's out of 2400, you know.
Extra Curriculars and/or Services performed.
Sexual favors do not count for this, unless you bone a virgin. This is a service. Providing others with new experiences is never a bad thing.

Things to include in a job application:
Previous experience:
Yes, we mean in bed...or in the backseat of the car, the bed of a pickup truck, the park bench, under the bleechers, in the public pool, in a public fountain, the ballpit at mcdonald's...the kinkier the ...