After have analyzed the cost for the hardware, it is clear that Lenovo Hardware are cheaper than the other two brands but at the same time Lenovo just offer the hardware without any other accessories like keyboards, monitor or other devices. On the other hand, both Hewlett Packard and Apple offer their desktop at higher price but with the opportunity to buy a fully equipped desktop with all the above accessories.
The operating system are already installed in all of the three option and for free but with the only difference that Apple has installed in its desktop, its Mac Os X Yosemite instead of Window 10 for Hewlett Packard and Window 10 Pro for Lenovo.
In terms of interoperability, the table shows the exceptional skills of Lenovo and the poor performance by Hewlett Packard and good but not exceptional by Apple desktops.