{
  "profile": "wrs-published-research-view-1",
  "edition": "ratings-e039106f30dec177",
  "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS",
  "entry": {
    "id": "intel-4004-microprocessor",
    "title": "The Intel 4004: a programmable processor on one chip",
    "summary": "The Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems.",
    "boundary": "The 4004 needed other components to form a complete system. The record preserves four documented engineering contributors without claiming a complete roster or settling every competing microprocessor priority claim.",
    "area": "Microprocessors",
    "topic": "Computing & AI",
    "year": 1971,
    "lane": "HUMAN",
    "result": "EMPIRICAL",
    "package_id": "intel-4004-microprocessor",
    "target": {
      "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
      "version": 1,
      "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
    },
    "humans": [
      "Federico Faggin",
      "Marcian E. Hoff",
      "Stanley Mazor",
      "Masatoshi Shima"
    ],
    "authors_complete": false,
    "human_role_note": "Named source contributors; broader team, precursor or trial-group roster remains incomplete.",
    "agents": [],
    "related": [
      "integrated-circuit-foundations"
    ],
    "subresults": [],
    "scientific_assessment": {
      "source_review": "SOURCE_CURATED",
      "scientific_review": "NOT_REVIEWED_BY_WRS",
      "formal_replay": "NOT_RUN",
      "provider_attestation": "NONE"
    },
    "sources": [
      {
        "id": "hf13-reading-intel-4004-microprocessor-0",
        "title": "Intel: Announcing a New Era of Integrated Electronics",
        "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
      }
    ],
    "geography": {
      "country_codes": [
        "US",
        "JP"
      ],
      "location_basis": "Documented research locations or paper affiliations for this contribution. Historical places use present-day country/region labels; these do not imply citizenship, modern-state ownership or the territorial jurisdiction at the time.",
      "source_url": "https://archive.computerhistory.org/resources/access/text/2017/03/102770826-05-01-acc.pdf",
      "target": {
        "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
        "version": 1,
        "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
      },
      "basis": "RESEARCH_LOCATION_OR_PAPER_AFFILIATION",
      "reviewed_on": "2026-09-26",
      "nationality_inferred": false,
      "sources": [
        {
          "title": "Attribution source",
          "url": "https://archive.computerhistory.org/resources/access/text/2017/03/102770826-05-01-acc.pdf"
        },
        {
          "title": "Attribution source",
          "url": "https://spectrum.ieee.org/chip-hall-of-fame-intel-4004-microprocessor"
        }
      ],
      "coverage_status": "COMPLETE",
      "country_labels": {
        "US": "United States",
        "JP": "Japan"
      }
    },
    "points": "130000",
    "published_grade": {
      "id": "intel-4004-microprocessor",
      "entry_id": "intel-4004-microprocessor",
      "band": "A",
      "modifier": null,
      "target": {
        "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
        "version": 1,
        "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
      },
      "what_changed": "The Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems.",
      "scope": "The Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems. Scope limitation: The 4004 needed other components to form a complete system. The record preserves four documented engineering contributors without claiming a complete roster or settling every competing microprocessor priority claim.",
      "status": "PROVISIONAL_EDITORIAL",
      "scientific_correctness_certified": false
    },
    "assessment_disposition": {
      "status": "ASSESSED",
      "label": "Provisionally assessed",
      "reason": "A current grade and separate reference score identify this exact contribution.",
      "target": {
        "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
        "version": 1,
        "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
      },
      "edition": "ratings-e039106f30dec177"
    }
  },
  "version": {
    "kind": "PUBLIC_RECORD_VIEW",
    "previous": null,
    "published_at": "2026-09-13T00:00:00Z",
    "publisher": {
      "principal_id": "urn:uuid:80116931-785b-40a2-a24b-9d59db0c7e33",
      "role": "WRS_EDITORIAL_PUBLICATION"
    },
    "record": {
      "contributors": [
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Federico Faggin",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Intel: Announcing a New Era of Integrated Electronics",
            "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Marcian E. Hoff",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Intel: Announcing a New Era of Integrated Electronics",
            "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Stanley Mazor",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Intel: Announcing a New Era of Integrated Electronics",
            "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Masatoshi Shima",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Intel: Announcing a New Era of Integrated Electronics",
            "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
          }
        }
      ],
      "evidence": [
        {
          "description": "Bibliographic/stated-result source; not a WRS proof verification",
          "id": "source-0",
          "kind": "source_reference",
          "source": {
            "citation": "Intel: Announcing a New Era of Integrated Electronics",
            "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
          }
        }
      ],
      "origin": "HUMAN_LEGACY",
      "record_profile": "wrs-local-research-notes-0.1",
      "record_type": "research_note",
      "rrp_version": "0.1",
      "scope": {
        "description": "The 4004 needed other components to form a complete system. The record preserves four documented engineering contributors without claiming a complete roster or settling every competing microprocessor priority claim.",
        "domain": "Microprocessors"
      },
      "sources": [
        {
          "citation": "Intel: Announcing a New Era of Integrated Electronics",
          "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html"
        }
      ],
      "statement": "# The Intel 4004: a programmable processor on one chip\n\nThe Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems.\n\n## Scientific scope\n\nThe 4004 needed other components to form a complete system. The record preserves four documented engineering contributors without claiming a complete roster or settling every competing microprocessor priority claim.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nFederico Faggin; Marcian E. Hoff; Stanley Mazor; Masatoshi Shima\n\nNamed source contributors; broader team, precursor or trial-group roster remains incomplete.\n\n\n\n## Original sources\n\n- [Intel: Announcing a New Era of Integrated Electronics](https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html)\n",
      "summary": "The Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems.",
      "title": "The Intel 4004: a programmable processor on one chip"
    },
    "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
    "version": 1,
    "source_ref": {
      "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
      "version": 1,
      "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
    },
    "export_view": "wrs-public-editorial-view-1",
    "public_view_hash": "sha256:41628225fcdd87d3a45ed436464655f4e076f9faa164b3ec99bfb3b985cc3840"
  },
  "target": {
    "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
    "version": 1,
    "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
  },
  "published_grade": {
    "profile": "wrs-published-grade-1",
    "edition": "2026-10-28.1",
    "id": "intel-4004-microprocessor",
    "entry_id": "intel-4004-microprocessor",
    "revision": 1,
    "title": "The Intel 4004: a programmable processor on one chip",
    "context": "Microprocessors",
    "track": "Scoped scientific or research-capability contribution",
    "band": "A",
    "modifier": null,
    "status": "PROVISIONAL_EDITORIAL",
    "assessed_on": "2026-09-14",
    "evidence_cutoff": "2026-09-14",
    "achievement_state": "SUPPORTED_SCOPED_RESULT",
    "what_changed": "The Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems.",
    "scope": "The Intel and Busicom project realized a programmable four-bit CPU within the MCS-4 chip set. Integrating processor functions on one chip helped make general programmable electronics accessible to smaller systems. Scope limitation: The 4004 needed other components to form a complete system. The record preserves four documented engineering contributors without claiming a complete roster or settling every competing microprocessor priority claim.",
    "evidence_summary": "Assessment uses the catalogue-linked source evidence for the stated contribution. The 4004 needed other components to form a complete system. The record preserves four documented engineering contributors without claiming a complete roster or settling every competing microprocessor priority claim.",
    "references": [
      {
        "title": "Intel: Announcing a New Era of Integrated Electronics",
        "url": "https://www.intel.com/content/www/us/en/history/virtual-vault/articles/the-intel-4004.html",
        "locator": "Retained catalogue source evidence; 1971 introduction, MCS-4 context and the named Intel/Busicom contributors."
      }
    ],
    "roles": [
      {
        "who": "Federico Faggin",
        "credit": "SCIENCE",
        "did": "Named source contributor; exact labor shares are not measured."
      },
      {
        "who": "Marcian E. Hoff",
        "credit": "SCIENCE",
        "did": "Named source contributor; exact labor shares are not measured."
      },
      {
        "who": "Stanley Mazor",
        "credit": "SCIENCE",
        "did": "Named source contributor; exact labor shares are not measured."
      },
      {
        "who": "Masatoshi Shima",
        "credit": "SCIENCE",
        "did": "Named source contributor; exact labor shares are not measured."
      }
    ],
    "target": {
      "record_id": "urn:uuid:c844929e-b35f-4fb9-a750-fead928e33dc",
      "version": 1,
      "content_hash": "sha256:8ace92ca38c239404e3d6f09fbf8e69378f2dad6e48d40beb07a964e37c58822"
    },
    "scientific_correctness_certified": false,
    "independent_expert_calibration": false,
    "method": "PROPRIETARY",
    "points": "130000"
  },
  "canonical_agent_submission": false,
  "scientific_verification_awarded": false,
  "reader_guide": null,
  "reading_status": "SOURCE_LINKED_NOTE"
}