The Encyclopedia of Contemporary Islam has the following 21 entries for sects, with references to other entries where relevant:
Ibāḍīyya, Īthnā ʿAsharīyya (see: Īmāmīyya), Aḥmadiyya, Ismā‘īlīyya, Īmāmīyya, Bābism, Bektaşiye (Baktāshīyya), Bahāism, Tījanīyya, khujas (Ismā‘īlīyya), al-Durūzīyya, Zaidids, salfism, Shaikhīyya, ʿAlawīyya, Qadyānīyya (see: Aḥmadiyya), Nazārids, al –Wahhabīyya.
1. Title + Definition + Region of Activity
Ibāḍīyya (or Abāḍīyya): A sect of Khavārij, groups of which live in Oman and North Africa.
Ismā‘īlīyya: A Shi’i sect established in the mid-2nd century LH with its members currently spread throughout the world.
2. A brief history of the formation of a sect
3. Possible branches
5. Variety of thoughts
6. Their situation in the contemporary world
7. Geographical dispersion
8. Political influences
9. Scholars and intellectuals who belong to that sect