Companies and government departments sometimes offer cadetships and internships to new staff. They provide work experience and training at the same time.
A cadet is a person in training. Some organisations offer cadetships where you can undertake formal training and obtain a recognised qualification, while at the same time, undertaking paid work and receiving on-the-job training and workplace experience. They are usually aimed to lead you into a longer-term career with that company and/or in that industry.
Internships are like cadetships but usually they are offered to people towards the end of their formal training or study, with the aim of providing some workplace experience for the intern. Internships are usually for a shorter period (for example 3 – 6 months) than cadetships and serve as a stepping-stone in your career pathway towards a full time job.
Cadets and Interns generally are paid, but less than people in the regular workforce. Some not-for-profit organisations offer volunteer internships that are not paid.