ION Systems: eMonocle Reader: http://www.ionsystems.com/emonocle/
iPhone: http://www.apple.com/iphone/
IPL (Internet Public Library): http://www.ipl.org/
IPL: Magazines: http://www.ipl.org/div/serials/
IPL: Newspapers: http://www.ipl.org/div/news/
IPL: Online Texts: http://www.ipl.org/div/subject/browse/hum60.60.00/
IRex Technologies: http://www.irextechnologies.com/
ISBD(ER) (electronic resources): http://www.ifla.org/VII/s13/pubs/isbd.htm
ISBD(G) (international standard bibliographic description): http://www.ifla.org/VII/s13/pubs/isbdg.htm
ISBN (international standard book number): http://www.isbn-international.org/