| IJO | Idiopathic Juvenile Osteoporosis
| Others |
| IJO | Independant Jewelry Organization
| Others |
| IJO | Independent Jewelers Organization
| Others |
| IJO | Indian J Ophthalmol
| Others |
| IJO | Indian Journal of Ophthalmology
| Others |
| IJO | Indian Journal of Orthopaedics
| Others |
| IJO | Individual Job Order
| Others |
| IJO | Int J Obes
| Others |
| IJO | International Journal of Obesity
| Others |
| IJO | International Journal of Oncology
| Others |
| IJO | International Journal of Ophthalmology
| Others |
| IJO | International Journal of Optics
| Others |
| IJO | International Journal of Oral
| Others |
| IJO | International Journal of Orthodontics
| Others |
| IJO | Internet Job Offer
| Others |
| IJO | Internet Journal of Ophthalmology
| Others |
| IJO | Interplay Jazz Orchestra
| Others |
| IJO | Islamic Jihad Organisation
| Others |