Most people spend about 25% of their computer time performing productive tasks such as writing, drawing, paying bills, or balancing a checkbook. these are all examples of content.

Writing, drawing, paying bills or a balancing a check book, all of them are examples of creating content. The user uses different software tools on the computer to make these tasks (to create something: to draw a drawing, to write a text..). 
For drawing he can use AutoCad or Google SketchUp for example. For writing the most commonly used tool is Microsoft Word. Or maybe he will create a presentation with Microsoft Power Point..