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A common problem with technical documents involves overly general, vague title: for example, nanotechnology, ebola, smart phones, solar power. Just think of all the things you could say about each of these topics!

When you craft a title for your document, consider indicating these elements but without create a title that is a paragraph long:

Consider this title: Nanotechnology: Overview of Medical Applications. The giant topic nanotechnology is indeed stated, but notice it is narrowed down to medical applications and a scoping element is applied—overview.

Notice the use of the colon in the preceding example. It's enables you to cut down in words. Another possibility is Medical Applications of Nanotechnology: Overview.