the basic things you require are (1) a desktop publishing (DTP) computer, (2) manuscripts for publishing, (3) editors, (4) huge data of the readers/subscribers (5) finance for initial investment, which is the real challenge as returns could take long time, leading to some anxieties.
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Find the type of business on the link below that best describes what it is that YOU do (or want to do). Then see how to truly use the Net to make your specific business (or business idea) thrive.