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System 4

version of Classic Mac OS
class operating_system Q9350447
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System 4

Summary

System 4 is an operating system[1]. It is known by 8 alternative names across languages and contexts.[2]

Key Facts

  • System 4's instance of is recorded as operating system[3].
  • System 4's follows is recorded as System 3[4].
  • System 4's followed by is recorded as System Software 5[5].
  • System 4's developer is recorded as Apple Inc.[6].
  • System 4's subclass of is recorded as Classic Mac OS[7].
  • System 4's different from is recorded as System 4[8].
  • System 4's Google Knowledge Graph ID is recorded as /g/120ldysz[9].
  • System 4's copyright holder is recorded as Apple Inc.[10].

Why It Matters

System 4 is known by 8 alternative names across languages and contexts.[2]

Related Entities

Apple Inc. Classic Mac OS operating system System 3 System 3 System Software 5

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). System 4. Retrieved March 9, 2026, from https://4ort.xyz/entity/system-4
MLA “System 4.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Mar. 2026, https://4ort.xyz/entity/system-4.
BibTeX @misc{4ortxyz_system-4_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{System 4}}, year = {2026}, url = {https://4ort.xyz/entity/system-4}, note = {Accessed: 2026-03-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): System 4 — https://4ort.xyz/entity/system-4 (retrieved 2026-03-09)

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