I have the aforementioned version of Photoshop on my main computer, but I also have a laptop and a mobile tablet pc that I use for work on the go (currently without PS installed on them).
I require the Photoshop I have to do my job; am I allowed to have it installed on all of my computers if I'm the only one using them?
No. The license is for one user and two (two) computers that are not used simultaneously. The license is also platform specific, both computers have to be either Macs or Windows boxes.
Thanks for clearing that up
The Photoshop CC and higher subscription models do allow for one Mac and one Windows box, if desired.