"BSc (Hons)" indicates one has completed an Honors Degree Bachelor of Science undergraduate program. An ordinary Bachelor of Science accepts grades on a pass/no pass basis. In contrast, an honors designation requires that students demonstrate superior academic performance.
The honors designation is offered primarily in universities in Great Britain, Ireland, Australia, New Zealand and South Africa. Specific requirements vary according to the school and particular degree program, but the honors degree usually requires additional advanced coursework and up to an extra year of study. A thesis frequently is mandatory.
The University of London became the first school to award a Bachelor of Science degree in 1860.