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Company spokesperson Kevin Lynch , Senior Vice-President and Chief Software Architect at Adobe , said the announcement is the " next logical step in the evolution of PDF from de facto standard to a formal , de jure standard . ( Saint-Hubert , writing in the seventeenth century , said that a nobleman must know how to ride , to fence , and to dance . Although pointe shoes have evolved in that they have become harder and boxier , their basic construction materials are still antiquated : Leather , burlap , paper , glue and nails . The main press release captures the excitement behind the announcement : " The Acrobat 8 product line introduces several major innovations in the areas of document collaboration , PDF content reuse , PDF forms , packaging of multiple documents , and controlling sensitive information . The law does provide a process by which the SEC can , by order , amend , delete , or add to the rules or standards of the Board ; 7 however , the Commission has not issued any orders of this nature to-date . The PDF books are difficult to download , large in size , of such low resolution they're difficult to read , unsearchable , and do not allow the user to copy text from them .