The Difference Between BS and BA courses is that the Bachelor of Science is typically the title for all degrees in sciences (Computer Science, Engineering, Health Sciences, you name it). But if you look strictly you might find some B. Sc. degrees even in Business, Nursing, Law, or Architecture. Apart from a B.A. degree, what determines this type of degree.
The Difference Between Lecturer and Professor is that Lecturers and professors work in similar manner, but their area of responsibilities and periodic tasks are totally different from each other. Both careers entail educating postsecondary learners however, a lecturer often has another career and is hired to teach a set course, while professors usually follow academic career paths toward earning tenure. Lecturers are often visiting staff at an academic institution who use their career experience to create a course syllabus and class structure, all while continuing in their primary career. On the other hand, professors teach within their scholarly specialty and conduct research toward being published in academic journals.
