HP's relatively new <a href="http://h10010.www1.hp.com/wwpc/uk/en/sm/WF04a/321957-321957-64295-3955552-3955552.html">ProBook</a> range sits below the corporate-focused EliteBook range and is aimed primarily at small businesses. There are several models in the range and we have previously examined the large 17.3in. <a href="http://reviews.zdnet.co.uk/hardware/notebooks/0,1000000333,39854658,00.htm">4710s</a>. The <a href="http://h10010.www1.hp.com/wwpc/uk/en/sm/WF25b/321957-321957-64295-3955552-3955552-3974409.html">ProBook 4310s</a> is a recent addition bringing the screen size down to 13.3in. to make a much more portable system — at least in theory. There are 14 models available, with prices ranging between £468 and £844 (ex. VAT). Our review sample, the <a href="http://h10010.www1.hp.com/wwpc/uk/en/sm/WF06b/321957-321957-64295-3955552-3955552-3974409-3997478.html">NX571EA</a>, costs £641 (ex VAT).