sentence: notable employees henry samueli gottfried ungerboeck , inventor of trellis coded modulation henry t. nicholas iii sophie wilson , designer of the arm cpu instruction set larry wall , creator of the perl programming language eben upton , creator of the raspberry pi single-board computer scott mcgregor , president and ceo broadcom and linux some free and open source drivers are available and included in the linux kernel source tree for the 802.11 b/g/a / n family of wireless chips broadcom produces .