The C horizon is below the A and B horizons of most soils. It consists of materials that were little altered by the soil-forming processes, though the materials may be modified by weathering. Below the C horizon in some soils is an R horizon of consolidated bedrock, such as limestone, shale, or sandstone.
Ultrabooks Guide. If you want one of the most portable computers on the market, consider getting an Ultrabook, a new kind of super-thin, ultra-light laptop that wakes from sleep quickly and offers a compelling Windows 8 experience.
Intel does make one size constraint, but even there it leaves too much wiggle room. An Ultrabook must be no more than 18mm (0.71 inches) thick if the laptop has a 13.3-inch or smaller display.Want to make a big âol Ultrabook? No problem! A 14-inch or larger display a manufacturer can bump the thickness up to 21mm (0.826 inches).ntel does make one size constraint, but even there it leaves too much wiggle room. An Ultrabook must be no more than 18mm (0.71 inches) thick if the laptop has a 13.3-inch or smaller display.