The ubiquitous availability of the Internet has made many government agencies turn either to state-run or vendor operated websites which provide listings of RFIs as well as RFPs and RFQs. Many allow vendors to sign up at no charge to receive e-mails of requests either generally or for specific categories of product or service for which there is an interest. The entire process may be conducted online and collects responses as scanned documents or Portable Document Format (PDF) files uploaded to the server. Or for legal reasons, a response must be sent in hard copy form and/or on CD/DVD disc or USB flash drive by mail or delivery service.