For example , USDA 's Animal and Plant Health Inspection Service 's ( APHIS ) web page contained a Regulations link that provides a listing of recently published rules , along with text or Adobe Portable Document Format ( PDF ) files allowing viewers to read the rules on line .
PDF is the format of choice for most of the documents on the internet , and USDA is keeping up with the times ; allowing visitors to view the rules and regulations online speeds up the process of technical support .