The smile makes Matt smile, of course, and he sits cross-legged on the mattress (there's no couch in his room, which is much smaller than L's).

"That one on the front is a bindrune. It should hopefully bring general protection: viruses, hacks, getting lost or stolen or just... I dunno, dropped on the floor. I tried to get it from as many angles as possible. And the firewalls and everything are enhanced too, but that's from tinkering with using runes in the actual programming. I'm trying to get to the point where I can just write entire programs in runes, but it'll take a while." He looks a little embarrassed. "That's the important stuff, anyway. The other things - I needed stuff to do to keep me awake, so..."