Practically, all modern languages descend from C, and thus use most of C's principles and basic structures. C is a perfect place to start learning about basic programming. C can be a launching platform for both more advanced C (like embedded operating systems), or, more likely, object oriented languages like C++ and Objective-C.
Building on the previous article on Method of Complements, lets take a look at the difference between signed and unsigned integer types.
Most people would agree that subtraction is more difficult, time consuming, and error prone than addition.
Ever come across an element where you wished that an automatically wrapping element, like an h1, would automatically change its font-size property to accommodate a certain width? I've got some CSS and Javascript for you.
Topically, hexadecimal is extremely useful for programmers to understand, and makes binary in general quite a bit easier to work with and represent both in code and out.