Seiko Epson
HX-20
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
Plate 01EPSON HX-20 Quick Review
Capó's TechWatch on YouTubePlate 02The Story of the Epson HX-20 The Most Important Computer You’ve never heard of - Tech Retrospective
Newsmakers TechWatch on YouTubePlate 03The World's First Laptop - Epson HX-20 / HC-20
The Retro CollectiveWatch on YouTubePlate 04Epson HX-20 - Short Demonstration
Andi’s Retro MuseumWatch on YouTubePlate 05The RealVoice of the Epson HX-20
Michael WesselWatch on YouTubePlate 06The Epson HX-20 Demo
Chainsaw1972Watch on YouTube
What it is
The Epson HX-20 is an early portable computer associated with Seiko Epson's computer history.[1]
What can it run?
Process applications and technology nodes documented for this tool.
- microcomputer
What do the numbers mean?
Control & software1
Configuration & options2
Vintage & configurations
- 1982Production start[1]
Epson entered the microcomputer market with the HX-20 in 1982.
What replaced it?
Related models
- successorSeiko Epson QX-10— Epson entered the microcomputer market in 1982 with the HX-20 before entering the home computer market with the QX-10.source[1]
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Not publicly documented
The following facts about the HX-20 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented variants, configuration options, or revision breakpoints of the HX-20 are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the HX-20 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the HX-20 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the HX-20 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the HX-20 are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (1)Every fact above is drawn from these public sources
- [1]en.wikipedia.org — en.wikipedia.orgen.wikipedia.org
Last updated Jul 29, 2026.
