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.
Ultrabook designs should be light, thin and stylish. 20mm or less for a device under 14â³ and 23mm or less for larger screen devices. All Haswell-generation (4th-Generation Core, introduced mid 2013) should include Touchscreens. Pricing is tending towards mainstream but premium models will sell for over $1000.