---
title: "01-bits-and-bytes"
aliases: 
tags: 
- cosc204
- lecture
---

# What is data
- A fact — a piece of information
	- corresponds to discreete facts about phenomena from which we gain information abou the world
- The concept of a *value* is fundamental to data
	- e.g., 25, $356.00, April, "this is a sentence", colours etc
- Vaues are abstract, they are interpretations of data
	- There are many way of storing the same data
	- e.g., 12, twelve, XII, 1100, · ··, ·----··---

# How computers represent data
- In Binary
- Stored in one of two states, true/false, 1/0, on/off, voltage/no voltage