Later , Eberhard co-founded .
Later , Eberhard founded start - up companies Network Computing Devices , Inc. ( making X Window - based network terminals ) and NuvoMedia that created one of the first e-book readers , the Rocket eBook .
Later , Eberhard co-founded and founded start - up companies Network Computing Devices , Inc. ( making X Window - based network terminals ) and NuvoMedia that created one of the first e-book readers , the Rocket eBook .