Binary, hexadecimal, and octal refer to different number systems. The one that we typically use is called decimal. These number systems refer to the number of symbols used to represent numbers. In the decimal system, we use ten different symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. With these ten symbols, we can represent any quantity.
We have two majors: a Bachelor of Science in geology and a Bachelor of Arts in geoscience. The B.S. in geology is a rigorous and well-rounded geology major that teaches all of the general skills needed to be successful for employment or graduate school in the field of geology.
Whatever gives you the widest range of class topics is what will give you the widest range of exposure to different things. You've got lots of choices for geology. There is environmental geology, hydrogeology, engineering geology, geophysics (often a distinct field) mining geology, petroleum geology, and more.