Toshiba has dropped the weight of its 14- and 15-inch mainstream business laptops by 20% and 6%, respectively. Toshiba has made its mainstream business laptops thinner and lighter and has boosted the performance of its most portable pro notebook with the addition of Intel's latest Core processors. The company has made its latest 14-inch Tecra, the R840, about 25% thinner and 20% lighter than its predecessor, the M11. The new 15.6-inch Tecra, the R850, is 19% thinner and 6% lighter than its predecessor, the A11. The Portg R830 is the same size and design as its predecessor the R700. The R830, which has a magnesium case, has a starting weight of 3.1 pounds and is an inch thick.