I have the main unit.
type computer
country USA
year 2001
os Windows XP
cpu Intel Mobile Pentium 4
speed 1,6 GHz
ram 256 MB
disk 1.44″ 1.44 MB
hd 40 GB
CD CD-RW/DVD
graphic 15″ TFT SXGA 1400×1050
colors yes
sound 16 bit Stereo Sound Blaster Pro compatible
ports VGA, S-video, headphone, microphone, PCMCIA, USB (2), Parallel, Serial
The IBM ThinkPad A31 — The Powerful ThinkPad
The IBM ThinkPad A31, released in 2002, was part of IBM’s A-series ThinkPads — desktop replacement machines designed for users who needed maximum performance in laptop form. Using an Intel Pentium 4-M processor with up to 2 GB of RAM and a 15-inch XGA display, the A31 provided workstation-class performance for demanding professional applications including CAD, financial modelling, and database work. The A-series represented the ThinkPad line’s commitment to serving the most demanding professional users alongside the more portable T and X series models.
ThinkPad Series Differentiation
By 2002, IBM’s ThinkPad line had evolved into a clearly differentiated family: the T-series (mainstream professional), X-series (ultralight), A-series (desktop replacement), and R-series (value mainstream). This segmentation allowed IBM to serve different professional needs with purpose-designed machines while maintaining the ThinkPad brand’s quality standards and design consistency across the range. The A31’s Pentium 4-M processor — Intel’s mobile variant of the desktop P4 — delivered desktop-class performance at the cost of shorter battery life, a trade-off the A-series explicitly accepted for maximum power.