As I am working on analysis of Lenovo company (hobby/investment), here is an interesting chart out of the work.
Beautiful pattern of demand for Laptops (relative demand per week, comparing to an annual average of demand) during the last decade:
The pattern is very precise and stable since 2004 during most of the year except maybe some end of the year behavior inconsistency. Though there are expected two peaks of demand at winter holidays, year-to-year variance during ww48 to ww52 is still high. Extremely high peaks at 2007 holidays, driven by Intel Core 2 Duo products wave.
You can see a clear back-to-school growth towards August from the (-10%) dead-season of Laptops marketing at Spring.