&gt;Total &quot;PC&quot; units are shrinking<p>source? Total units sold are shrinking (or steady, depending on your definition of PC and who&#x27;s numbers you are using), but total units in operation is much closer to describing Microsofts market and hard to measure.<p>&gt;Windows PC sales are shrinking compared to Mac computer sales<p>Macs are personal computers in every sense except marketing speak. The competitor selling better isn&#x27;t a sign of the market shrinking.<p>&gt;and phones are exploding compared to PCs<p>And in the summer desk fans sell better than hair driers. Phones are not in the same market as PCs.