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This is the recovered Machine Room from 2005. Please don't expect wonders. The look and feel of this site is nine years old, and so is its code. Some of the functionality has been recovered while the rest of the site is modernised and restructured. Watch this space!
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No known owners (I still own one | I used to own one). I have seen one.
Search Google or Ebay United States for Acorn A4 (more links, auctions & searches)
Other series members
A500, A305, A310, A410, A440, A680, M4, R140, A3000, A410/1, A420/1, A440/1, R260, R225, A540, A5000, A4, A3010, A3020, A4000, RiscPC 600 2M HD210, RiscPC 600 5M HD210, RiscPC 600 9M HD420, A7000, RiscPC 700 10M HD850, RiscPC 700 4M HD425, RiscPC 700 5M HD425, StrongARM RiscPC, CoNCord, A7000+, A7000 Expanded, A7000 Net.
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Pricing 1,399.00 GBP (United Kingdom, June 1992), 1,699.00 GBP (United Kingdom, June 1992)
Emphasis Education, Graphic Arts, Music, Portable computing, Programming
Operating System RISC-OS 3
Timeline Released: June 1992
CPU type ARM3
CPU word length 32 bits
CPU clock rate 24 MHz
ROM Size 2 MiB
RAM Size 2 MiB, 4 MiB
Keyboard Typewriter keyboard
Number of keys 83
Dimensions 29.7 x 21.0 x 6.0 cm (11.7 x 8.3 x 2.4 in)
Weight 3 kg (6.6 lb)
Graphics modes 640x480x16
Total number of colours 16
Total peripheral memory 1.56 MiB, 61.6 MiB
Sound channels 8
Sound output Stereo
I/O Ports Audio output, Keyboard, Mouse, Parallel, RS-423

More technical info...

Full Acorn Machine List.
A Technical History of Acorn Computers (Version 0.5 Beta).