I use characters from whichever book I’m reading at the time. Examples:

• Arya: From ASOIAF, a small but powerful Ultrabook
• Cthulhu: From HP Lovecraft, a huge 17" laptop
• Horus: From the Horus Heresy books, A powerful laptop
• Binky: Death’s white horse from discworld, a white desktop
• Peaches: A rat that always carries a book with her. My home server