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Intro to IT

What is Information Technology?

The use of digital Technology like , computers and internet to store and process data into useful information.

  1. Education

  2. Medicine

  3. Journalism

  4. Construction

  5. Transportation

  6. Entertainment

  7. Any Industry

Digital device

What does an IT support specialist do?

  1. Managing

  2. Installing

  3. Maintaining

  4. Troubleshooting

  5. Configuring

Failure as Feedback

  • It’s 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

  • The communication that a computer uses, also known as a base-2 numeral system.

  • We group binary into 8 numbers or bits

  • A group of 8 bits referred to as a bites.

  • Each byte can store one character, and we can have 256 possible values thanks to the base-2 system

  • 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.