Introduction of this homepage
"PDF" is the format of electronic document developed by Adobe Systems Inc. in 1993.
Not related to the environment, it was easy to send as electronic data, spread widely with the Internet by an excellent performance such as having security, and it became even existence that may be called a standard in the document format.
It widely introduces freewares related to this PDF on this site.
1) The contents of this website is what the site owner investigated oneself.
2) Although I am trying for there to be no error as much as possible, it does not guarantee about the contents.