Can I use photoshop to edit pictures etc when my computer is offline?,

Question

I"m new to image processing, but am an old hand at word processing.   I've been bounced from window to window for what seems like several hours now. Adobe Photoshop, like Microsoft Office, seems to be the industry standard for its field and both companies seem to be constantly finding new ways of screwing the customer, or that's the way it looks to me. When initially purchasing the product,it is not always possible to get essential information either from reading the package, asking the store clerks who sell it to you, or going on internet chats at vendor websites as I am doing now. 
Sometimes when you buy software it is only good for one computer, sometimes up to five.  And what happens, now, if you process words and images offline and miss out on the endless series of "updates" (that may have come from hackers instead of from Adobe and Microsoft as the senders claim?)  I seem to be running into all sorts of problems first with continuing to do word processing with Microsoft products, and in trying to avoid these same problems now when getting started with image processing with Adobe.
I have been around word processing software for the last twenty years, or actually for as long (and longer) than there ever was such a thing.  There was a time when you bought a disk, put it in your computer, followed the prompts, and started typing.  The software didn't change and there was no time limit on being able to pull a document out of a file, make changes to it, and then put it back-- "ad infinitum."  Apparently things are different now, are they not?  What a mess.

Answer 1

Yes, the desktop applications in Creative Cloud, such as Photoshop and Illustrator, are installed directly on your computer, so you don’t need an ongoing Internet connection to use them.
An Internet connection is required the first time you install and license your apps, but you can use the apps in offline mode with a valid software license. The desktop apps will attempt to validate your software licenses every 30 days.
Annual members can use the apps for up to 99 days in offline mode. Month-to-month members can use the software for up to 30 days in offline mode.
Creative Cloud Help | Creative Cloud / Common Questions
Hope that Helps!
~ Arpit