Computer Education

INTERNET
Uses of the Internet
Internet Access
How Information Travels Over the Internet
Network Names and Addresses
Client/Server Architecture
Electronic Mail and News Groups
Other Internet Applications
Bandwidth
History
The Future of the Internet

Computer Memory
Internal RAM
Internal ROM
External Memory
Magnetic Media
Optical Media
Magneto-Optical Media
Cache Memory

HISTORY
Beginnings
First Punch Cards
Beginnings
Precursor to Modern Computer

TYPES OF COMPUTERS
Digital and Analog
Range of Computer Ability

NETWORKS

PROGRAMMING LANGUAGES
Machine Language
Assembly Language
High-Level Languages
FLOW-MATIC
FORTRAN
BASIC

HOW COMPUTERS WORK
Operating System
Computer Memory
Bus
Input Devices
Central Processing Unit
Output Devices

HOW A CPU WORKS
INTRODUCTION
Function
Branching Instructions
Clock Pulses
Fixed-Point and Floating-Point Numbers

HISTORY
Early Computers
Transistor
The Integrated Circuit

Other Internet Applications


Although the World Wide Web is the most popular application, other Internet applications are widely used. For example, the Telnet application enables a user to interactively access a remote computer. Telnet gives the appearance that the userís keyboard and monitor are connected directly to the remote computer. For example, a businessperson who is visiting a location that has Internet access can use Telnet to contact their office computer. Doing so is faster and less expensive than using a dial-up modem.

Another application, known as the File Transfer Protocol (FTP), is used to download files from an Internet site to a userís computer. The FTP application is often automatically invoked when a user downloads an updated version of a piece of software. Applications such as FTP have been integrated with the World Wide Web, making them transparent so that they run automatically without requiring users to open them. When a Web browser encounters a URL that begins with ftp:// it automatically uses FTP to access the item.

The Internet can also be used to transfer telephone calls using a computer with a microphone and speakers or a phone with a special adapter. Calls made in this way to computers or telephones that also connect to the Internet are often free.

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