Thank you for the opportunity to help you with your question!
HIV stands for Human Immunodeficiency Virus while AIDS stands for Acquired Immunodeficiency Syndrome. HIV is basically a virus which couldn't be removed by our body like other virus including flue, cold etc. AIDS is consequence of HIV, since it is a condition brought on body by HIV. So, we can say that one can have HIV but may or may not have AIDS while opposite is not true.
Please let me know if you need any clarification. I'm always happy to answer your questions.