papa :)
Adobe Photoshop would be great for editiing and printing photos, but you may want to consider Adobe Photoshop Elements.
As the name suggests, Adobe Reader is used for reading only. Unfortunately, you cannot edit the documents with it.
The preferred way would be to purchase Adobe Acrobat.
Adobe Acrobat
Cool Edit Pro was a software program by Syntrillium Software. Syntrillium was purchased by Adobe in 2003 and renamed Adobe Audition. The current version is 3.
To edit pictures
No, Adobe Reader will read PDF files, while Adobe Acrobat can create and edit PDF files. Adobe Reader is just a free PDF reader, but Adobe Acrobat Pro/Stand is much more powerful to deal with PDF files, will help to create, edit and convert PDF.
There are many online websites that can show you how to edit PDF files, but the main website to check would be Adobe. Adobe has the products and instructions on how to edit PDF files the correct way.
When you show your products photos to your customers and need to edit them, you will use adobe photoshop.
Cool Edit Pro was a commercial program and was sold to Adobe. It is now known as Adobe Audition. You'll have to purchase the Adobe version to be compatible with current operating systems.
you can edit songs with adobe audition. Audacity is also a great free tool.
To edit the contents of a DVD you need a DVD authoring program such as Adobe Encore.