Intro to IT
What is Information Technology?
The use of digital Technology like , computers and internet to store and process data into useful information.
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Education
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Medicine
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Journalism
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Construction
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Transportation
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Entertainment
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Any Industry
Digital device
What does an IT support specialist do?
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Managing
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Installing
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Maintaining
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Troubleshooting
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Configuring
Failure as Feedback
- Itβs projected that IT jobs in the US alone will grow 12% in the next decade.
- There are thousands of companies around the world searching for IT professionals like you!.
Course Introduction
- Computers are everywhere
From Abacus to Analytical Engine
Computers
- A device that store and process data by performing calculations.
QWERTY
Punch Cards
Algorithms
A series of steps that solve specific problems.
The Path to Modern Computers
Cryptography
The art of writing and solving codes.
Typewriter
RelayDisk
ENIAC
Hello World
Programming Language -> Mechine level -> Binary Codes
IBM Computers and Microsoft - Bill Gates
GNU
Open source
Anyone could modify and share it.
PDAs
Computer Lanugage
Binary System
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The communication that a computer uses, also known as a base-2 numeral system.
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We group binary into 8 numbers or bits
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A group of 8 bits referred to as a bites.
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Each byte can store one character, and we can have 256 possible values thanks to the base-2 system
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What does following translate to? 01101000 01100101 01101100 01101100 01101100
Character Encoding
Assing our binary values to characters, so that we as a human can read them. Ex. Emojis and their binary values
- ASCII
- The first character in the ASCII yo binary table β a lowercase a β maps to 01100001 in binary.
- UTF-8
- 11110000:10011111:10011000:10000001 -> Laughing Emojis
- Color pallets
Binary
- Ex. Switch and Bulb
Logic Gates
Allow our transistors to do more complex tasks. like decide where to send electrical signal depending on logical conditions.
How to count in binary.
Abstraction
To take a relatively complex system and simplify it for our use. Ex. Engine, Car, Staring
Computer Architecture Overview
- Hardware Layer: Made up of the physical components of a computer.
- Operating System: Allow hardware to communicate with system.
- Software Layer: How we as a human interact with our computer.
- User: interact with the computers.