Sony Vaio PCG-U3

 The Sony Vaio PCG-U3 is a compact ultra-mobile PC (UMPC) released in October 2002, 

sold exclusively in Japan.  Weighing about 820–860 grams (1.8 lbs), 

it features a 6.4-inch XGA (1024×768) TFT display and was designed for 

highly portable business use. 

It is powered by a Transmeta Crusoe TM5800 processor running at 933 MHz, 

with 256 MB of onboard RAM (expandable to 512 MB) and a 20 GB 1.8-inch hard drive. 

 Graphics are handled by an ATI Mobility Radeon M6 with 8 MB of VRAM.  

The system originally shipped with Windows XP Home Edition, pre-installed in

 Japanese with English language support available. 

Despite its small size, it includes a range of ports: 2 USB 1.1 ports, FireWire (i.LINK), 

VGA output, Ethernet, headphone/microphone jacks, and a Memory Stick slot.  

It also features a unique ThumbPhrase input system optimized for one-handed Japanese

 text entry, which does not function with English software. 

The PCG-U3 lacks built-in Wi-Fi but supports wireless connectivity via PCMCIA or USB adapters. 

Battery life ranges from 2.5 to 4 hours with the standard battery, and up to 12 hours with 

the extended battery. 

The Sony Vaio PCG-U3, released in October 2002 exclusively in Japan, is a pioneering ultra-mobile PC 

(UMPC) weighing 820–860 grams with a 6.4-inch XGA (1024×768) TFT display.  It features a 

Transmeta Crusoe TM5800 933 MHz processor, 256 MB of RAM (expandable to 512 MB), and a 20 GB

 1.8-inch HDD. 

Designed for portability, it includes a TrackPoint (pointing stick) on the top-right corner, two USB 1.1 ports,

 FireWire (i.LINK), VGA output, Ethernet, and a Memory Stick slot. It runs Windows XP 

Home Edition (pre-installed in Japanese, with English support), but lacks built-in Wi-Fi—requiring PCMCIA

 or USB adapters. 

A unique feature is ThumbPhrase, enabling one-handed Japanese text input, which does not work with

 English software.  The Jog Dial acts as a quick-launch control for programs and system functions. 

Powered by the energy-efficient Transmeta CPU, it offers 2.5–4 hours of battery life with the standard pack 

and up to 12 hours with the extended battery.  Despite its limitations for modern use, it remains a collector’s 

item due to its rarity, innovative design, and historical significance as an early UMPC.