Apple Inc. (NASDAQ:AAPL) had a 20.8% increase in personal computer shipments for the second quarter, marking the largest growth among global PC manufacturers. What Happened: The PC industry, which faced historic declines, is showing signs of recovery with two consecutive quarters of growth. According to the latest report by IDC that was made public on Tuesday, the worldwide shipments of desktops and laptops saw a 3% rise from the same period last year. Apple and Acer Inc. experienced the most substantial shipment growth among major manufacturers, with the latter posting a 14% increase. Subscri…