Photoshop is a popular commercial graphics editing software. Using Photoshop or similar programs you can:
Illustrator is a popular commercial vector editing software. Below are some examples of projects used to create and edit with illustrator and similar programs:
Vectors are geometric objects, like points, lines, curves, and polygons that are used to build the image. This differs from pixel based images which are made up of blocks of color. Pixel (or raster) images can get distorted if you re-scale them.
However, vectors based images allow you to scale a design to any size without losing quality. The same logo on a business card can be scaled up to the size of a billboard without being distorted. You can see this principal in a word processing program when you increase and decrease the size of your type. The characters always have smooth edges and stay in proportion.
About InDesign
Adobe InDesign is a desktop publishing and page layout designing software application. It can be used to create works such as posters, flyers, brochures, magazines, newspapers, presentations, books and ebooks