The smartphone and tablet landscapes remained largely unchanged in March as far as operating system usage share is concerned. New data from analytics firm Net Applications shows that the collective operating system share owned by Apple’s iPhone and iPad inched down to 59.87% in March from 60.59% in February. iOS’s share had skyrocketed in February as it continued to gain after losing share ahead of the holidays. Google’s Android smartphones and tablets dipped as well in March according to Net Applications’s data, dropping to 18.66% from 19.02% in February. Symbian stayed flat at 2.77% in March, and the only mobile operating system to show gains during the month was RIM’s BlackBerry OS, which climbed a fraction of a point to 2.21% from 2.15% in February. A chart showcasing Net Applications’s data follows below.