Pressure Ulcer Deï¬nition Localized injury to the skin and /orunderlying tissue usually over a bonyprominence, as a result of pressure, orpressure in combination with shearand/or friction.
1 The 2.4GHz MacBook with 2GB of memory is available for about $1,000.  Apple's ultraportable laptop, the MacBook Air, is aimed at business travelers. The 1.6 or 1.86GHz processor is slower than a MacBook but what it loses in power it gains in portability.
1 Most desktop computers do not include a monitor. See: How Much Does a Computer Monitor Cost.  While most desktops include at least a basic mouse and keyboard, some users prefer to upgrade. A wireless keyboard costs from about $20 to over $200, a wireless mouse from about $20 to $100 or more.