ACT-R

Structured entry data for human tools, AI systems and machine clients.

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    "@type": "Thing",
    "identifier": "ENT-00000498",
    "name": "ACT-R",
    "alternateName": [],
    "additionalType": {
        "category": "AI Systems",
        "type": "Historical AI System",
        "subtype": "",
        "lxkeysEntity": false
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    "description": "ACT-R is a cognitive architecture from Carnegie Mellon University used to model human cognition, memory, perception and decision making.",
    "creator": "Carnegie Mellon University",
    "url": "https://lxkeys.world/entry.php?id=ENT-00000498&lang=en",
    "sameAs": "https://act-r.psy.cmu.edu/",
    "image": "",
    "lxkeysWorld": {
        "worldId": "ENT-00000498",
        "kind": "AI Systems",
        "type": "Historical AI System",
        "subtype": "",
        "classification": "Historical AI System",
        "organization": "Carnegie Mellon University",
        "originContext": "Public AI and cultural record",
        "firstPublicAppearance": "1993",
        "currentStatus": "Historical record",
        "documentationStatus": "Documented",
        "documentationIndex": {
            "total": 74,
            "documentation": 25,
            "evidence": 13,
            "structure": 25,
            "relationships": 11,
            "level": "Level IV Connected"
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        "lxCalendarium": {
            "start_date_utc": "2023-04-01",
            "created_utc": "2026-06-16T00:00:00+00:00",
            "created_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3",
            "updated_utc": "2026-06-16T00:00:00+00:00",
            "updated_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3"
        },
        "facts": [],
        "capabilities": [
            "Historical AI milestone documentation",
            "Method or system lineage",
            "Public archival reference",
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        "limitations": [
            "The system is documented primarily for historical significance and may no longer be maintained, accessible or representative of current AI practice.",
            "Reconstructions and later summaries can differ from the original hardware, software and experimental conditions.",
            "Performance should be interpreted in the historical context and evaluation methods of its period."
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        "tags": [
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            "Research"
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        "timeline": [
            {
                "date": "1993",
                "title": "Initial development or public milestone",
                "description": "ACT-R entered the documented public record in 1993. This event is retained at the precision supported by the Entry’s reviewed source history.",
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                "url": "https://act-r.psy.cmu.edu/",
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