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HP-21

Scientific calculator by Hewlett-Packard
Place calculator Q17513359
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HP-21

Summary

HP-21 is a calculator[1]. HP-21 draws 40 Wikipedia views per month (calculator category, ranking #10 of 33).[2]

Key Facts

  • HP-21's image is recorded as Taschenrechner HP-21.jpg[3].
  • HP-21's instance of is recorded as calculator[4].
  • HP-21's manufacturer is recorded as Hewlett-Packard[5].
  • HP-21's Commons category is recorded as HP-21[6].
  • HP-21's Freebase ID is recorded as /m/0114p9ht[7].
  • HP-21's display technology is recorded as light-emitting diode[8].

Body

Designation and Status

HP-21's instance of is recorded as calculator[4].

Why It Matters

HP-21 draws 40 Wikipedia views per month (calculator category, ranking #10 of 33).[2]

Related Entities

Hewlett-Packard

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.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.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). HP-21. Retrieved May 3, 2026, from https://4ort.xyz/entity/hp-21
MLA “HP-21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/hp-21.
BibTeX @misc{4ortxyz_hp-21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{HP-21}}, year = {2026}, url = {https://4ort.xyz/entity/hp-21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): HP-21 — https://4ort.xyz/entity/hp-21 (retrieved 2026-05-03)

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