Changes

*Original content is fairly well protected

*Original content is fairly well protected

*Efficient, compact format<ref name="investintech.com">http://www.investintech.com/resources/articles/pdfadvantages</ref>

*Efficient, compact format<ref name="investintech.com">http://www.investintech.com/resources/articles/pdfadvantages</ref>

*May be secured with encryption and passwords,<ref name="investintech.com">http://www.investintech.com/resources/articles/pdfadvantages</ref> and what each person can do with the PDF may be set separately

*May be secured with encryption and passwords,<ref name="investintech.com"/> and what each person can do with the PDF may be set separately

*Documents are saved as originally intended to appear, so they will display properly even when special fonts and other content are not available to a recipient.<ref name="sysinfotools.com">http://www.sysinfotools.com/What%20is%20PDF%20file%20format.html</ref>

*Documents are saved as originally intended to appear, so they will display properly even when special fonts and other content are not available to a recipient.<ref name="sysinfotools.com">http://www.sysinfotools.com/What%20is%20PDF%20file%20format.html</ref>

==Disadvantages==

==Disadvantages==

*Editing is difficult by design, which can be inconvenient if something must be changed.

*Editing is difficult by design, which can be inconvenient if something must be changed.

*Although touted as secure, read-only files, they can be edited with a little effort using special software.<ref>http://www.pcworld.com/article/222031/PDF.html</ref><ref>http://www.wikihow.com/Edit-a-PDF-File</ref>Theses changes are often but not always placed on another virtual layer of the file.

*Although touted as secure, read-only files, they can be edited with a little effort using special software.<ref>http://www.pcworld.com/article/222031/PDF.html</ref><ref>http://www.wikihow.com/Edit-a-PDF-File</ref> Theses changes are often but not always placed on another virtual layer of the file.

*PDF files are only supported by [[Windows]] and [[Mac OS|Macintosh]] [[operating system]]s.  These are useless to users of GNU/Linux and UNIX systems.<ref name="sysinfotools.com">http://www.sysinfotools.com/What%20is%20PDF%20file%20format.html</ref>

*PDF files are only supported by [[Windows]] and [[Mac OS|Macintosh]] [[operating system]]s.  These are useless to users of GNU/Linux and UNIX systems.<ref name="sysinfotools.com"/>

*PDF files are created with a set (A4 or A3) size, which cannot be changed.  This size is perfect for printing on 8.5 by 11 inch paper, but does not fit most modern computer monitors very well.<ref>http://www.ehow.com/list_5925177_disadvantages-pdf-format.html</ref>

*PDF files are created with a set (A4 or A3) size, which cannot be changed.  This size is perfect for printing on 8.5 by 11 inch paper, but does not fit most modern computer monitors very well.<ref>http://www.ehow.com/list_5925177_disadvantages-pdf-format.html</ref>

==References==

==References==

{{reflist|2}}

{{reflist|2}}

[[category:File Formats]]

[[Category:File Formats]]