Psion Series 3C

The Psion Series 3 range of personal digital assistants were made by Psion PLC. The four main variants are the Psion Series 3 (1991), the Psion Series 3a (1993), the Psion Series 3c (1996), and the Psion Series 3mx (1998), all sized 165 × 85 × 22 mm.

The Psion Series 3c was the next variant after the Psion Series 3a. (A Psion Series 3b does not exist). It has a slightly different external appearance to the earlier variants because a redesigned badge is placed centrally on the lid, the lid has fewer undulations, and a port for an infrared connection is visible. The plastic case is painted matte dark grey. The backup battery for the Series 3c is a CR1620

The Psion Series 3c is a highly versatile palmtop computer designed and built in the UK. It is powered by a 7.68 MHz NEC V30H microprocessor (an enhanced 80C86), and runs Psion's EPOC16 operating system. It has a 480x160 liquid crystal display capable of two levels of grayscale and is equipped with a switchable electroluminescent backlight. The Series 3c has two megabytes of ROM containing the operating system and numerous applications programs, and one or two (two in the case of my units) megabytes of battery-backed static RAM for system memory as well as file storage.

The Series 3c is somewhat similar to the TRS-80 Model 100, only vastly more powerful and capable. Enthusiasts of that machine know that one of its great advantages over other systems is the fact that it can be turned off in the middle of an activity (editing a text file, for example), and that when it is turned on again, operation is resumed right where it left off. It is unnecessary to wait for the machine to boot its operating system upon powering it up. Many fans of that machine seem to be unaware that the same capability does, in fact, still exist in modern systems. I was most pleased to discover that the Psion range of palmtops is capable of exactly the same thing. One can even turn off a Psion in the middle of saving a file, with no loss of data. Upon being powered up again, it resumes exactly where it left off!

Size 165 x 85 x 22 mm
Weight 275 grams with batteries
Processor NEC V30H at 7.68 Mhz
Rom 1 MB
Ram 1 Mb and 2 Mb
Screen 480 x 160 LCD
Power 2 AA batteries
Backup battey Lithium battery
External power 9 volts, 150 mA
Communication RS-232C, 56400 bps, IrDA
Sound Same as 3A
Keyboard 58-key QWERTY
Extra keys 9 reprogrammable buttons
Expansion 2 Solid State Disks, external PC-Card
Backlit Yes USA first then Uk models

Our 3C was verty kindly donated by Robert Kay

Manufacturer: Psion
Date: 1996

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Psion Series 3C Manuals:

Item Manufacturer Date
Psion Series 3 Programming Mnaual Psion Nov 1991
Psion Series 3 - 3 Link (RS232) Manual Psion Nov 1991
Psion Series 3A Money User Guide Psion Nov 1993
Psion Series 3a User Guide Psion Dec 1994
Psion Series 3mx User Guide Psion Jul 1998

Psion Series 3C Articles:

Item Manufacturer Date
Psion 128k Solid State Disk (SSD) Psion Plc Unknown
Psion Series 3 Parallel Link Psion Unknown
Psion Serial Link for Apple Macintosh Psion Unknown
PSION PC Card Modem Adaptor 1991

Magazines RELATED to Psion Series 3C in our Library

Item Manufacturer Date
Personal Computer World - November 1991 Nov 1991
Personal Computer World - December 1991 Dec 1991
Personal Computer World - December 1994 1 Dec 1994
Personal Computer World - March 1996 Mar 1995
Personal Computer World - June 1995 Jun 1995

Catalogues RELATED to Psion Series 3C in our Library

Item Manufacturer Date
Silica - Computers and Video Games Silica 1 Oct 1994

Other Systems Related To Psion Series 3C:

Item Manufacturer Date
Psion Organiser 1 Psion 1984
Psion Organiser II XP Psion 1986
Psion Organiser II XP Psion 1986
Psion Organiser II CM Psion 1st January 1986
Psion MC200 Psion 1989
Psion Organiser II LZ64 Psion 1989
Psion Organiser II LZ Psion 1st January 1989
Psion Mobile Computer MC 400 Psion September 1989
Psion Series 3 Psion 1991
Psion Organiser HC120 Psion 1st January 1991
Psion HC100 Starter Kit Psion March 1991
Psion HC110 Starter Kit Psion March 1991
Psion Series 3A Psion 1993
Psion Series 3A Psion 1993
Psion Siena 512K Psion 1996
Psion Series 5 Special Edition (Green) Psion 1997
Psion Series 5 (Boxed) Psion 1997
Psion Series 5 Psion 1997
Psion Series 3mx Psion 1998
Psion Series 7 Psion 1999
Psion netBook Psion 1999
Psion Revo Psion 1999
Psion Series 5mx Psion 1999
Psion Revo Plus Psion September 2000

This exhibit has a reference ID of CH30934. Please quote this reference ID in any communication with the Centre for Computing History.


Psion Series 3C

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