O Level Certificates in Nigeria

1. WAEC – GCE: West African Examinations Council – General Certificate Examination
2. WAEC – SSCE: West African Examinations Council – Senior School Certificate Examination
3. NECO – GCE: National Examinations Council – General Certificate Examination
4. NECO – SSCE: National Examinations Council – Senior School Certificate Examination
5. NABTEB  – NTC: National Business and Technical Examinations Board – National Technical Certificate
6. NABTEB – NBC: National Business and Technical Examinations Board – National Business Certificate
7. NBAIS – SAISSCE: National Board for Arabic and Islamic Studies – Senior Arabic and Islamic Secondary School Certificate Examination