Those chips held the persona programs from his cyberterminal. To take them was, technically, a theft, but the programs had been tailored for him and they would be destroyed before someone else took over his terminal. It was actually cheaper to burn a new set for the new man or woman. The chips contained no data, and he was sure his new employer would supply fresh persona chips suited to their own systems. Taking these was symbolic. His Matrix presence would leave along with his physical body.