Here in the Netherlands we have a period during our bachelors in which we can chose a different (though related) field of study, we call this period (which is usually half a year) A "Minor".
For example I studied computer engineering (which is my major, if i understand it correctly) then during these 4 years I spend half a year studying Information System Security, this half year is the Minor.
In the English language, is this also called a Minor? Is this a thing people/companies will understand?