Up to that point, phones came in three basic categories: low, medium and high.

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High-def sets fall into three basic categories: direct-view, rear-projection and front-projection.

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The basic task that we have as astronomers studying galaxies is trying to classify them and divide them into their basic categories, which have been with us almost a century.

NPR: What Makes Our Solar System Special?

They fall into two basic categories.

WSJ: We Don't Need Guantanamo Bay

Ever since 1988, when he curated his first show and drove his own beaten-up car to pick up Norman Rosenthal, the secretary of the Royal Academy of Arts, to ensure it was seen by the right people, Mr Hirst has produced five basic categories of work.

ECONOMIST: Damien Hirst

The registration process asks each company to submit information in several categories: basic company profile, general information on number of employees, products and services, financial information on annual revenues, their ability to support electronic business transactions, any quality and environmental management certifications, details on their ethical dealings and social responsibility, information on data security, information on diversity policies, and on their use of independent contractors.

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How do users get past the very basic most popular "free" or "paid" categories and find the gems tucked away in the recesses of the App Store?

FORBES: A Better Way To Find iPhone Apps