**How They Really
Work**

Osher Lifelong Learning
Institute

University of Illinois, Urbana-Champaign

Scott Badman, Instructor

**Session 2: Binary
Arithmetic**

**September 23,
2013**

This evening we will look at the the definition of "Data" and then the Binary Number System, which is the practical basis of all data processing.

**Core
Concepts**

The definition of "data"

The Binary Number System (Base 2) works exactly as the Decimal Number System (Base 10) (or any other number base).

**Topics
**

**Resources**

Definition of Data (Power Point)

Binary Arithmetic (Power Point)