IT Essentials & Data Recovery For Your Online Businesses. Baxi Nishant
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Data Recovery For Your Online Businesses
Baxi Nishant
© Baxi Nishant, 2019
ISBN 978-5-0050-4203-3
Создано в интеллектуальной издательской системе Ridero
IT Essentials & Data Recovery For Your Online Businesses
Nishant Baxi
Table of Contents
Chapter 1
The Beginning
A Short History of Information Technology
The Hellenistic World
Early Programmable Devices
Communications and Information Storage
Information Technology Since 1980
Information Technology Today
Types of Information Tools and Media
Personal Computer
Storage Media
Internet Options and Communication
Chapter 2
Understanding BizIT
Assessing Your I.T. Needs
Desk and chair
Bookcase/Shelves
Table
Computer and Monitor
Printer, Copier, FAX Machine
Other I.T. Options
All Those Bells And Whistles; Do You Really Need Them?
Getting It Cheap
Chapter 3
Getting Organized
Setting Up Your Workspace
Organizing the Worktop
Peripherals and Office Supplies
About Wireless Technology
Getting Online
Dial-Up
Satellite
DSL
T1 and T3
A Word Of Caution
Networking: The Intranet
Sharing Printers and Programs
About Sharing Programs
Protecting Yourself And Your Business
E-mail Issues
Computer Care And Maintenance
Protecting The Hardware
Software Maintenance
Chapter 1
The Beginning
When people hear the words «Information Technology,» the first things that come to mind are computers and the Internet. It may also bring up words like «network,» «intranet,» «server,» «firewall,» «security,» as well as more arcane expressions such as «router,» «T-1,» «Ethernet,» or the mysterious and exotic-sounding «VoIP» (pronounced «voyp»).
In fact, information technology is all of these things, and more. It’s hardly new, however. Information technology is as old as the brain itself, if you think of the brain as an information processor. As far as I.T. being a science, even that goes back as far as the earliest attempts to communicate and store information.
And that is essentially what information technology is: the communication and storage of information, along with the ability to process and make use of the information stored. In this chapter, we’ll begin with a brief history of I.T., what it comprises today, and the different major types of I.T. systems available today.
A Short History of Information Technology
As human societies have grown in size and complexity, so has the need to collect, store and transmit information. While it could be argued that brains represent a
form of «bio-information technology,» the Greek word «» – from which we get the word «technology» – really refers to scientific or mechanical knowledge, particularly that which involves the use of tools. Therefore, we’ll begin our journey with human’s first attempts to record and transmit knowledge through mechanical means.
might think of as «information technology.» Using a combination of tools that included manganese «crayons» and clay that was colored with various pigments, early humans left these images on the walls of a cave near Lascaux, France and on cliffs in the Algerian Sahara. These have been dated as being approximately 18,000 and 8,000 years old respectively. Unfortunately, there is no way to be certain exactly what message was being communicated (a problem our own descendants 15,000 years from now may very well encounter!)
Since the images depict animals that were commonly hunted at the time, and given the importance of game animals to a hunting-gathering culture, it’s possible that such images were attempts to present information about such game, or part of a rite designed to ensure a successful hunt.
The invention of writing systems – including pictograms such as hieroglyphics, alphabetic writing and «syllabic» systems – seems to have taken place almost at the same time as the development of agriculture. Agriculture introduced such formerly unknown concepts as land ownership, advanced trade and the accumulation of wealth, which in turn led to more complex societal structures. As you might expect, this necessitated more detailed and efficient record-keeping. Alphabetic writing has a substantial advantage over pictograms (hieroglyphs), because a relatively limited number of symbols (letters) can be used over and over in infinite combination to communicate nearly anything. (As you will see later, modern I.T. uses only two of these symbols!)
Preserving and storing such information posed certain challenges; information either had to be inscribed on stone or clay tablets (which were heavy) or animal skins, wax tablets or papyrus (which weren’t durable).
The Hellenistic World
The Classical Greeks were the first people of record to attempt to find scientific, rational explanations for natural phenomena. Some of the earliest proto-computers known were mechanical devices developed by the Greeks. One of these was a form of abacus (which also developed and was used in ancient China). The device facilitated and simplified mathematical calculation.
Early Programmable Devices
By the time the gradual break-up and fall of the Roman Empire was complete in the year 476 C.E., scientific and technological advances in the Western world had ground to a halt. While much of the scientific knowledge of the Greeks was preserved by Irish monks and Arab scholars, it wasn’t until the fourteenth century that principles of engineering were rediscovered and applied to information. The first of these was of course the printing press. Although the concept of movable type printing had been developed in China some four hundred years earlier, it was Gutenberg’s device in 1447 that revolutionized communications, making it easier and faster to record and disseminate information than ever before. The first truly programmable device would not come along for another 354 years, however.
The Jacquard Loom of 1801 was a product of the Industrial Revolution. This invention used a series of specially punched paper cards that functional as templates, allowing for the automatic weaving of highly intricate patterns. Those punch cards became very significant to computing in the 1950’s, 60’s and 70’s.
The next development was Charles Babbage’s «Analytical Machine» – a fully-programmable computer that unfortunately was never actually built. Babbage worked on designs from 1837 until his passing in 1871. This steam-powered mechanism would have also utilized punch cards, with a central processing unit (CPU) and a form of memory storage in the form of a system