The Professional category includes many upper-end vocational positions, such as accounting, computing, engineering, law, medicine, police and veterinary services. Textbooks and study guides for these specialized careers will be geared towards 'real-world' situations and will focus more on practical solutions dealing with day to day life, rather than learning for the sake of knowledge alone.

Many of these categories will be further subdivided into more focused groups, in order to help you locate the specific area of study you are interested in. Interspersed throughout these areas will be handbooks, which can provide valuable reference 'in the field' later on, as well as an aid to studying while preparing to enter a chosen profession.