Almost all recent desktop computers can easily run software such as Photoshop CS5 (See links below for system requirements). Such considerations should address what you plan to do with the software. For example the level of colour accuracy required between the image on screen and when printed, the size of the image that you will be manipulating, etc.
Photoshop and Illustrator are both Image Editing Programs for your computer. They are often used professionally for businesses.
All of them, the Macintosh computer was made for graphics and picture editing programs such as Adobe Photoshop.
computer programs
Photoshop for raster images. Illustrator for vector images. These are the industry standards.
camcorder and some computer editing programs (photoshop, AVS video editing)
No Photoshop CS5 and Photoshop Elements are separate programs.
GIMP is a free alternative to Photoshop.
Computer wallpapers are just one way people customize their computer to make it truly theirs. Some programs that can be used to create nice looking computer wallpapers include Photoshop and PIcsart.
Yes there are several programs available. Photoshop can be used everywhere.
Nothing bad, it is image editing program to work with images. When it's not open, it does nothing to your computer, when it is open, it uses a lot of the RAM memory. Photoshop is a very RAM intensive program, but if you ever need those resources back to use with other programs, all you need to do is exit the Photoshop.
No, they are separate programs or software's to use and to buy.
No, none of the Photoshop programs are free