Hardison's Laptop, like much of the Leverage computer equipment, is produced by Hewlett Packard.
At the end of Season 2, and through Season 3 Hardison appears to have added an HP Mini Netbook to his arsenal.
According to DVD Commentary, it was suggested by consultants that Hardison should move from notebook computers to netbook computers because real life hackers use them. They are cheaper and easier to throw away once they are compromised.
In Season 3, Hardison appears to have moved to an iPad-like tablet device.