"One's primary computer" refers to the main device that someone uses most often for their digital activities, such as work, school, or personal use. It is the computer they rely on the most and spend the most time with. Full definition
The MacBook is an ideal primary computer for students and frequent travelers, and while it's not the ideal machine for people whose work involves processor - heavy tasks, it should be able to handle pretty much anything you throw at it. (businessinsider.com)
For Google - powered phones, it's an opportunity to largely banish Android's update woes and make the devices that are many people's primary computers more powerful than ever. (androidcentral.com)
Given that smartphones are the dominant devices to access the Internet in India, and in many cases primary computers, larger screens do find favor among consumers. (techtree.com)