Adobe Photoshop CS3 is most user friendly but if you use any of the version of adobe Photoshop then you will also feel user friendliness slowly slowly for the same versions which are used by you.
Last one, Photoshop CS5 because new version have improved all tools and you can use them without further refinement.
The most current version of Adobe Photoshop can be found at www.adobe.com
which is the most updated version? Adobe Photoshop 9 or adobe photoshop 3.0
A photo editing software. It is consumer version of Adobe Photoshop and have most of Photoshop features. Elements costs 1/6 of Photoshop price.
Photoshop CS5
That question is kind of hard to understand, but I'm assuming you mean which version of Photoshop is the best. That depends on what you want to do with Photoshop. Basically the newest version Adobe Photoshop cs5 is the best one because it's the newest and it's got the most options
Adobe Photoshop CS8 most likely WILL BE compatible with OS X, the most current version CS6 is compatible. At this time my crystal ball is malfunctioning, so I can't look into the future to check for you, sorry.
You can Adobe Photoshop from the Adobe website - http://www.adobe.com/or at most IT stores. If in Australia, try city software, I find it really cheap. The price of Photoshop varies. There are two different types - the elements version and the full version. with the full version you can also get pro and whatnot. elements doesn't include as much and costs about $130 in Australia. The full version is around $600
Adobe Photoshop Elements 11 is the February 2012 release of Adobe Photoshop products.
There are 3 new releases of Photoshop from Adobe. (Adobe, in my opinion, is the most trusted, most popular brand of photoshop products.) The first is Adobe Photoshop Lightroom. According to Adobe.com, ''Master your digital photography workflow with Adobe Photoshop Lightroom® 2. Import, manage, and showcase large volumes of photographs or perfect a single image. Ideal for: Professional Photographers, Passionate Photographers.'' The next new release from Adobe is Adobe Photoshop CS4: ''Take advantage of unrivaled editing and compositing power, a more intuitive user experience, and significant productivity enhancements. Ideal for: Professional Photographers, Serious amateur photographers, Graphic designers, Web designers.'' The last new product is Adobe Photoshop CS4 Extended: ''Get everything in Adobe Photoshop CS4 plus breakthrough tools for editing 3D models and motion-based content and performing advanced image analysis. Ideal for: Film, video, and multimedia professionals, Graphic and web designers using 3D and motion, Manufacturing professionals, Medical professionals, Architects and engineers, Scientific researchers.'' Quotations from Adobe.com.
There are Adobe Photoshop training classes available on the official website, these classes teach you how to get the most out of your Adobe Photoshop. There are also no class fees.
The most commonly used features in adobe photoshop is the editing tools for pictures.
This depends on your question....as it is not clear enough. Photoshop documents apply to Adobe Photoshop. Photoshop uses many different file formats but the most common file is called a "PSD", which stands for Photoshop Document. There is also PSB which is an extended larger version of PSD files and it stands for Photoshop Big.