computers are changing the world and everywhere we use tech daily how do computers work? what makes a computer? how info is represtented? different parts of computer what code is tools are made to solve problems inventions to remove manual work machine can help us in thinking. solving equations machines needed to manipulate info. 4 diff tasks to make a computer: take input store info process info output info computers were as big as rooms computers were basic calcs now we can use them to play games or control robots types of input: keyboard mouse xbox controller storage: info stored in memory takes info from memory and then changes it and sends it back output: videos text games signals computers work on ones and zeros wires and cirtuits carries all electrictiy electric current can create yes or no binary is 0/1 any number can be represtnted by 0 or 1s 32 wires can store from 0 to billion numbers types of info can be saved: text images etc. colors can be represtnted by numbers waveform can be saved as numbers circuits take signal ON or off multiple signals can be combined and if both signals are 0 then result is 0 you can make an adder circuit where it adds both numbers. you can make more than one adder 8 bit add adder adds by giving signals into the circuit circuits can make substraction/division/multiplications computer calculations can be made by humans but computers are faster smaller computers are quick because circuits are smaller too input converts physical input to binary output takes binary and gives out as physical such as sensors/microphones to display each letter, computers make thousands of instructions circuits/plugs etc. are hardware software is inside the computer CPU is the masterchip that controls other computer hardware it has circuits to make simple math to send and receie CPU knows which commands to do CPU tells cirucuit to add, then sends to memory binary commands stored in memory binary code controls all hardwares programming languages is changed to binary operating system manages how software controls the hardware OS controls all software