Islam
- 501
- Hamzah Islamic Center
- Includes daily prayer schedule, information about Sunday school, adult and youth programs. (Alpharetta, Georgia)
- 502
- Islamic Society of Central Florida
- A community based religious organization catering to the spiritual, educational and social needs of the citizens of Central Florida. Includes information about Islam and their local activities.
- 504
- Connecticut Council of Masajid
- Information about and for the Muslim community; includes news, information about Iqra newsletter, a directory of mosques in the state, and resources on Islam.
- 505
- Dar-Us-Salaam
- Information about the Muslim community of College Park, Maryland, their religious and educational activities and projects.
- 506
- Islamic Center of Connecticut
- Information about the Islamic community of Windsor, prayer times, and location.
- 507
- Islamic Society of Western Connecticut
- Serves the Muslim community in the greater Danbury area; information about activities, prayer timings, and about Islam.
- 508
- Islamic Center of Irvine
- Attempts to bring awareness to Muslims in the Irvine area, as well as around the world, of the enthusiasm and drive of the local Muslim community. Has a newsletter, events list, services, prayer times and contact information. (Irvine, California)
- 509
- Islamic Educational and Cultural Centre
- Information about their activities, events, publications, and contact details. Office and library in Hayward, with community services in Fremont, San Jose and Sacramento.
- 510
- Muslim Community Association of the San Francisco Bay Area
- Umbrella organization for the Muslim community in the area. Includes an events listing, newsletter, and information about their services.
- 511
- Muslim Community Center of Greater San Diego
- A non profit organization dedicated to the growth and success of Islam and Muslims in an open, tolerant environment. Information about activities, prayers and local resources. (San Diego, California)
- 513
- Birmingham Islamic Society
- Information about their activities and education program; includes prayer times. (Birmingham, Alabama)
- 514
- Muhammad at-Taqi
- Profile of the Ninth Imam of the Twelver Shia tradition; from the Encyclopedia of the Orient.
- 515
- Musa al-Kazim
- Profile of the Seventh Imam in the Twelver Shia tradition; from the Encyclopedia of the Orient.
- 516
- Muhammad al Mahdi
- Profile of the Twelfth Imam, and beliefs about him; from the Encyclopedia of the Orient.
- 517
- Ali r-Rida
- Profile of the Eighth Imam in the Twelver Shia tradition; from the Encyclopedia of the Orient.
- 518
- Jafar as-Sadiq
- Profile of the Sixth Imam in the Twelver and Ismaili traditions; from the Encyclopedia of the Orient.