{"subjects": ["Operating systems (Computers)", "UNIX (computer operating system)"], "key": "/works/OL3972234W", "title": "Introduction to UNIX", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL726863A"}}], "type": {"key": "/type/work"}, "covers": [4734464], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-10T04:59:30.002549"}, "last_modified": {"type": "/type/datetime", "value": "2026-08-30T21:09:34.668833"}}