Computer science previously formed an option in group 5 of the Diploma Programme curriculum but now lies within group 4. As such, it is regarded as an experimental science, alongside biology, chemistry, design technology, physics and environmental systems and societies.

 This group change is significant as it means DP students can now select computer science as their group 4 subject rather than having to select it in addition to mathematics as was previously the case.

http://www.ibo.org/programmes/diploma-programme/curriculum/sciences/computer-science/