CONFERENCE METADATA — incomplete historical coverage; source presence is not proof of delivery.
Research dataset: Lukas Walter, Clemens Sauerwein, Daniel Woods, InfoSec.pptx, https://doi.org/10.5281/zenodo.15989593, CC BY 4.0 https://creativecommons.org/licenses/by/4.0/. Changes: metadata extraction, exact-match reconciliation and uncertainty flags. No endorsement implied.

{
  "id": "ccc-be34f9cc-7ace-50e2-8801-7d90ea21587a",
  "title": "History of the mainframe - from S/360 to Linux",
  "presenters": [
    "Claudio Imbrenda",
    "Nico Boehr"
  ],
  "event": "Gulaschprogrammiernacht 21",
  "year": "2023",
  "source_url": "https://media.ccc.de/v/gpn21-184-history-of-the-mainframe-from-s-360-to-linux",
  "source_kind": "CCC recording catalog",
  "source_file": "ccc-gpn21.json",
  "rights": "Metadata and source links only; abstracts, biographies, transcripts and media not republished",
  "delivery_status": "Not independently verified",
  "title_status": "source supplied",
  "presenter_status": "source supplied",
  "media": [
    {
      "kind": "recording page",
      "url": "https://media.ccc.de/v/gpn21-184-history-of-the-mainframe-from-s-360-to-linux"
    }
  ],
  "provenance": [
    {
      "event": "gpn21",
      "title": "Gulaschprogrammiernacht 21",
      "source": "https://api.media.ccc.de/public/conferences/gpn21",
      "file": "ccc-gpn21.json",
      "sha256": "16e551fd84f54af0ac627e5c05e2f993c8fa1db185e40979292b8f34fbc8c7fc",
      "checked": "2026-10-16T03:46:35Z",
      "source_records": 92
    }
  ],
  "source_guid": "be34f9cc-7ace-50e2-8801-7d90ea21587a",
  "source_event_api": "https://api.media.ccc.de/public/events/be34f9cc-7ace-50e2-8801-7d90ea21587a",
  "date": "2023-06-09T14:00:00.000+02:00",
  "duration_seconds": 3091,
  "language": "eng",
  "tags": [
    "gpn21",
    "184",
    "2023",
    "Software & Infrastructure"
  ],
  "event_acronym": "gpn21",
  "source_schedule_url": "https://cfp.gulas.ch/gpn21/schedule/export/schedule.xml"
}