Well, this sort of thing has been done for years, remember the ubiquitous 'found bomb-making equipment on the premises' statement you used to hear on the news after searches of properties in Northern Ireland? Well, I doubt there is a kitchen or shed in the land that doesn't have 'bomb-making equipment' in it; flour, weedkiller, a length of pipe, some nails etc, etc, all of these are bomb-making equipment if used in that way. Just recently, the guy who was found guilty of mailing letter bombs in the UK actually used the small quanties of the stuff that goes bang in party poppers as a component of his letter bombs, so by that definition, you can find bomb making equipment at a children's party if you want to call it that.
And since your computer has an internet connection, and therefore allows access to information on bomb-making if you choose to search for it, your computer qualifies too.
But if these things are found within a premises and tied up with other elements that indicate some prospective evil deed in the planning, then they must be allowed to be submitted as potential evidence. The Crown Prosecution Service has enough of a hard time putting cases together with all the loopholes and bleeding heart get out clauses they have to contend with, and fighting terrorism with one hand tied behind your back is not possible, especially when the terrorists are not limited by any such self-imposed constraints. So in the right context, yes, those things are bomb-making equipment.
Chock