The phrase "related discipline" means a subject or field of study that is connected or similar to another subject or field. It is often used to describe areas of knowledge that are connected but may have slight differences. Full definition
Most lawyers have an advanced degree or training in related disciplines such as accounting, engineering or business. (hullmcguire.com)
The membership draws on those with interest or backgrounds in psychology, communication, sociology, family studies, anthropology, philosophy, and other related disciplines. (iarr2012conference.com)
Education and Training: To become an advertising account executive, you require a degree in business related discipline such as marketing, business, management, and statistics. (jobdescriptionandresumeexamples.com)