This document is the second part of a university project on operating systems presented by Cristian David Bolaños Moreno. It defines operating systems and discusses their history. It also provides examples of popular operating systems like Windows, Mac OS X, Linux, Unix, and Solaris. The next parts of the project will explain the components of operating systems, including main memory, and how they are classified based on task and user administration.

1. UNITEC CORPORATION UNIVERSITY
SYSTEMS ENGINEERING
(ENGLISH FOUR)
PROJEC ADVANCE OPERATING SYSTEMS
PRESENTED BY:
CRISTIAN DAVID BOLAÑOS MORENO
DATE:
APRIL 22, 2013

2. THE OPERATING SYSTEMS
As we have been discussing, operating systems contain a variety of important topics
that complement together, these topic are divided into topics and sub, this topics
were the most important to make it clear to students that are operating systems, the
topics that we will address are:
1. definition
2. history
3. Examples of operating systems
4. Components
 main memory
5. Classification
 Task administration
 User administration
In this second advance I will explain the points 1 to 4 and in the third advance to
explain the 5 and 6 to finish clarified the topics of operating systems.
1. DEFINITION
The operating system is the most important in a computer Operating systems
perform basic tasks such as recognizing the keyboard connection, sending
information to the screen, keeping track of files and directories on the disk, etc..
The operating system is also responsible for security making sure that unauthorized
users do not have access to the system.
2. HISTORY
The importance of operating systems historically born from the 50's, we began to
see that operator tasks could be expressed in a program, where over time and its
enormous complexity was called "Operating System" After, reaching the third
generation born the first operating system: the OS/360 of IBM.
In the fourth generation the friendly interfaces emerged trying to attract the public
to the use of computers as ordinary tools. Become popular MS-DOS and UNIX on
these machines.

3. EXAMPLES OF OPERATING SYSTEMS
1. Microsoft Windows
2. Mac OS X
3. GNU/Linux
4. Unix
5. Solaris
6. Google Chrome OS
BIBLIOGRAPHY
 O'Brien, James A. (2006). Managerial information systems.
 Silberschatz, Abraham (2006). Operating systems.
 http://es.wikipedia.org/wiki/Sistema_operativo#Ejemplos_de_sistemas_oper
ativos_para_PC