1GartnerSays Worldwide PC Shipments in the First Quarter of2013 Drop to Lowest Levels Since Second Quarter of 2009[EB/OL], [2013-04-10]. http: // www. gartner. com/news-room/id/2420816.
2GartnerSays Worldwide PC Shipments in the Second Quar-ter of 2013 Declined 10. 9 Percent [EB/OL]. [2013-07-10].http: //www. gartner. com/newsroom/id/2544115.
3GartnerSays Worldwide PC Shipments in the Third Quarterof 2013 Declined 8. 6 Percent[EB/OL]. [2013-10-09]. http:// www. gartner. com/newsroom/id/2604616.
4GartnerSays Worldwide PC Shipments Declined 6. 9 Percentin Fourth Quarter of 2013[EB/OL]. [2014-01-09]. http: //www. gartner. com/newsroom/id/2647517.
5GartnerSays Worldwide Traditional PC, Tablet, Ultramo-bile and Mobile Phone Shipments to Grow 4. 2 Percent in2014[EB/OL]. [2014-07-07]. http: // www. gartner. com/newsroom/id/2791017.