### Brief Background

Through 2002-2004, I prepared for the computer science Illinois WYSE test; while studying, I slowly developed a collection of computer science resources that I have included below.

I haven’t maintained these pages since 2004, and I have no intention of keeping them updated, but I have kept them online for the benefit of anyone who needs a starting point for the WYSE test or anything similar.

### Table of Contents

- Binary Numbers

Introduction to binary numbers, including negative binaries, fractional binaries, parity checks and more. - Octal and Hexidecimal

Learn what octal and hexidecimal number systems are and how to convert from binary to octal to hexidecimal and back. - Conditional Logic

The basics of using AND, OR, NOT, and XOR expressions to determine the value of logical expressions. - Sorting

There’s many different ways to sort lists — learn what each method is and how it works. - Binary Trees

Figure out what traversing a binary tree means and learn to identify special types of trees. - Prefix, Infix, Postfix

There’s more than one way to write A(B+C) — learn the other two methods of writing out mathematical expressions. - Circuits

Take your knowledge of conditional logic a step further and learn how to translate pictoral circuits.