# IBM PS/55 Note

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{{Short description|Series of notebook computers released in Japan}}
{{Infobox information appliance
| name = IBM PS/55 Note
| aka = 
| logo = File:IBM PS55 logo.svg
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| developer = 
| manufacturer = [IBM](/source/IBM)
| family = [IBM PS/55](/source/IBM_PS%2F55)
| type = 
| generation = 
| release_date = {{Start date and age|1991}}<ref name="Valligra-1987">{{Cite news|last=Valligra|first=Lori|url=https://books.google.com/books?id=vDsEAAAAMBAJ&dq=PS%2F55+5535&pg=PA21|title=IBM Japan Announces Addition to PS/55 Line|date=1987-09-07|page=21|newspaper=InfoWorld  |language=en}}</ref>
| lifespan = 
| price = between {{US$|long=no|1680}} and {{US$|long=no|2550}}
| discontinued = 
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| predecessor = [IBM PC Convertible](/source/IBM_PC_Convertible)
| compatibility = 
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}}
thumb|Model N23SX (5523-S)
The '''IBM Personal System/55 Note''' (stylized as '''PS/55 note''') is a series of [notebooks](/source/Laptop) manufactured by the [IBM](/source/IBM) subsidiary [IBM Japan](/source/IBM_Japan) as part of the [IBM Personal System/55](/source/IBM_Personal_System%2F55) series.

Machine type 5523 were designated as 'notebook' computers distinct from type 5535 which were larger 'laptop' multistation computers.

The international [IBM PS/2 Note](/source/IBM_PS%2F2_Note) series was based on the PS/55 Note series and used the ISA bus (with the final exception of the C52).

== History ==
IBM started selling the PS/55 Note series in Japan in April 1991.<ref>{{Cite news|last=Sanger|first=David E.|date=1991-04-11|title=COMPANY NEWS; Selling Now in Tokyo: Tiniest I.B.M. Portable|language=en-US|work=[The New York Times](/source/The_New_York_Times)|url=https://www.nytimes.com/1991/04/11/business/company-news-selling-now-in-tokyo-tiniest-ibm-portable.html|access-date=2021-04-20|archive-url=https://archive.today/20210420173842/https://www.nytimes.com/1991/04/11/business/company-news-selling-now-in-tokyo-tiniest-ibm-portable.html|archive-date=2021-04-20|issn=0362-4331|url-status=live}}</ref>

[Western Digital](/source/Western_Digital) has supplied video and logic chips for the PS/55 Note.<ref>{{Cite web|date=1991-12-31|title=SCIENCE/TECHNOLOGY: New IBM Products May Be Good News for Western Digital|url=https://www.latimes.com/archives/la-xpm-1991-12-31-fi-1397-story.html|access-date=2021-04-21|website=[Los Angeles Times](/source/Los_Angeles_Times)|language=en-US}}</ref>

The second generation notes had an N model number signifying 'Notebook'. The third and fourth generation notes changed to C for 'Colour' and M for 'Monochrome'.
== Models ==
The prices for the PS/55 Note varies between {{US$|long=no|1680}} and {{US$|long=no|2550}}. 
* Model 'note' (5523-S0x) was the first release with a 12Mhz 80386 CPU.
* Model N23/N33 SX (5523-SCx) (03/1991) was the second generation note with 16Mhz 80386 CPU.
* Models M23V and C23V (10/1992) joint-third-generation and first TFT option note, but without a Trackpoint.
* Model C52 (10/1992) was a fourth and final generation note identical to the [ThinkPad 700C](/source/ThinkPad_700C) with MCA bus.<ref name="Watch Impress">{{Cite web |title=ThinkPad 10th Anniversary Special 10 |url=https://pc.watch.impress.co.jp/docs/2002/1029/tp10.htm |access-date=2021-04-20 |website=[Watch Impress](/source/%3Ajp%3AWatch_Impress) |language=ja}}</ref><ref>{{Cite web |title=みなとみらいの大和事業所で「20世紀のThinkPad」と再会した |trans-title=Reunited with "20th century ThinkPad" at Yamato Office in Minato Mirai |url=https://www.itmedia.co.jp/pcuser/articles/1504/07/news030.html |access-date=2021-04-20 |website=[ITmedia](/source/%3Ajp%3AITmedia) |language=ja}}</ref>
* Model T22sx (1992) was an offshoot machine with detachable tablet and keyboard machine.
* Model N27sx (02/1992) was not a notebook and forerunner of the [PS/2 CL57SX](/source/PS%2F2_CL57SX) model.

== Reception ==
The PS/55 Note was a rapid success in Japan.<ref>{{Cite book|title=Management of design alliances: sustaining competitive advantage|date=1998|publisher=Wiley|others=Margaret Bruce, Birgit H. Jevnaker|isbn=0-471-97476-5|location=Chichester|pages=93|oclc=36663061}}</ref>

== References ==
{{Reflist}}

== External links ==
* [https://thinkwiki.de/PS_55_Note Thinkwiki.de - PS/55 Note]

{{IBM personal computers}}

PS/55 Note
Category:Computer-related introductions in 1991
PS/55 Note

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Adapted from the Wikipedia article [IBM PS/55 Note](https://en.wikipedia.org/wiki/IBM_PS%2F55_Note) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/IBM_PS%2F55_Note?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.