Research firm IDC has posted its latest figures on worldwide PC shipments for the first quarter at 60.33 million, up slightly by 0.6% on year. But according to Gartner, the volume reached 62.18 million units, dropping 2.4% on year.

The two research firms also had different results for the biggest PC vendor worldwide in the first quarter with IDC naming Hewlett-Packard (HP) as the largest with 13.14 million unit shipments and Gartner giving the title to Lenovo with 12.38 million units.

Another difference between the two research firms' numbers was the inclusion of Chromebook shipments. IDC's number included Chromebook shipments, while Gartner did not. The Chromebook market has been growing rapidly in the past few years and related shipments reached a new record at 9.09 million units in 2016, according to Digitimes Research's notebook figures.

In IDC's figures, Acer also returned as a top-5 vendor in the first quarter, shipping 4.12 million PCs worldwide in the quarter.