为什么惠普可能新 Logo 的消息反复强调 13°？

这篇报道写道(里面视频里面 13°更多):
"The defining signature of the system is the 13° angle.
13° represents HP’s spirit as a company,
driven forward by ingenuity and optimism about the future and a belief in human progress.
It also refers to the world of computing by recalling the forward slash used in programming.
13° exists within the brand identity, in the graphic language, product design and UI.
— Moving Brands"
"A New HP: So Close, Yet So Far Away
"
但是为什么是 13°啊?