Theory and History of Ontology

website ontology logo

My other websites:

History of Logic

website logic logo


website bibliographia logo

Theory and History of Ontology by Raul Corazzon | e-mail:


This site is for users that cannot see properly the Main Site ( because they have an older browser (desktop or mobile). The content is identical, but the design is easier.


Main Site and Mirror Sites

About This Site

Theory and History of Ontology, created April 13, 2000 at the address, moved August 13th 2010 to a new address:; a mobile version is available when the screen resolution is less than 480 x 500 pixels.

The site is best viewed with a recent version of one of the following browsers: Chrome, Edge, Firefox, Internet Explorer, Maxthon, Opera, Safari, UC Browser.

Please note that only Internet Explorer version 11 is supported by Microsoft after January 12, 2016.

There are two sections, currently under development, for Italian and French readers (see Pages in Language other than English), that will contain bibliographical information and references to works published in these languages.

Ebook and PDF version: Theory and History of Ontology - ebook version (the entire website can be downloaded in .epub or .mobi format, or as a searchable PDF file)

For readers with older browsers another website with an easier menu is available:


Note on the Fonts

These fonts are used:

For the text and the words in ancient Greek: Georgia (Windows, Apple Mac, Linux);

For the transliteration of Arabic terms: Arial MS Unicode (Windows, Apple Mac, Linux).

For the logical symbols: Lucida Sans Unicode (Windows); Lucida Grande (Apple Mac); Lucida Sans or DejaVu Sans Condensed (Linux);

If you need to download one of these fonts use these links:

How to Cite This Website

If you want to cite or link a page of my site please use the address:


Logo of the Websites

Website Status and Performance Monitor

To check if one of my websites is up or down, try the "Uptime" link at the bottom of every page.

To check if a generic website is down you can use:


Test the security of a website

Some links to free tools useful to check Website security:

Mobile Friendliness

Test the Mobile Friendliness of a website with these tools: