Zypad WR1100 is a computer that straps around your forearm, designed for use by the military and particularly adventurous ravers. From GPS World‘s review:
The WR-1100 uses the Linux (Kernel 2.6) operating system, weighs in at just 23 ounces or 650 grams, and is about 4.5 x 3.5 x 3 inches in size. It is rugged to MIL-STD (military standards) 810F and 461E for temperature, thermal shock, humidity, transit, and crash shock; normal and vehicular vibration; altitude and enclosure class for immersion in three feet of H20; so you don’t have to worry about damaging the WR-1100 when you hit the deck. … The WR-1100, the device I am reviewing, also incorporated Wi-Fi and Bluetooth. The WR-1110 adds an RFID or radio frequency identification capability and the WR-1120 adds ZigBee in place of Bluetooth. … it is a computer with all the associated capabilities.
Speaking of the miitary, I deserve a medal for getting through this post without making a Fallout reference. Not even a clever, oblique one in the headline.