These are the nouns:
information , computer system ( compound noun made up of two nouns); computer files ( compound noun); understanding, computer file (compound noun), computer, paper file system ( compound noun ; <em>paper-file </em>is working as a compound noun and as a modifier of <em>system</em>); people,information, bills, receipts, instructions, manuals, work, home, items, use, items ,table, desk, information, people,items, file folders (compound noun); people, labels , folder, file folder, name, labels ,information, file ,labeling , way, information, computer files (compound noun); paper files ( compound noun); information, computer, files, file folder, name, user, name, computer file (compound noun), filename.