Not all Panasonic Toughbooks are big briefcases, made to withstand the worst that nature has to throw at them. The company also manufactures a series of business-rugged Toughbooks–some of the lightest in the world and just as tough–to meet the demands of corporate and consumer folks who take their computing on the road. Panasonic announced three additions to its ultraportable line, the W7, the Y7 and the T7 tablet, with some necessary internal upgrades.