he created an entire science of communication which has since inveigled its way into a host of applications, from DVDs to satellite communications to bar codes - any area, in short, where data has to be conveyed rapidly yet accurately.
问题：本句的阴影部分的语法结构是什么？
①“，from DVDs to satellite communications to bar codes”是插入语吗？
②破折号起到什么作用？破折号后面的语法结构是什么？是一个完整的句子吗？
