recovery from the trash

i put some items in my trash a while ago...i can not remember where they originated from, but now i find that i need them. Does it matter where they go? And if so, is there a way i can command the OS to put them back from where i took them in the first place? I beleive these files are for an application.

I do not think so
you have to put them back manually.
best thing is to reinstall the app.
never throw away anything from apps folder

Like he said, its not a good idea to remove things from App, Home, Library, that you don't know what it is/its purpose.

Many files have many extentions.

If you are uninstalling an app and wanting to clear out it's other factors use command + f to find its attachments, only delete them if you are sure they are apart of the 3rd party app.

Example... Like if you download a Battery add-on you don't want to delete everything with the battery name!

i'd reinstall the application's that are effected by stuff you deleted.