Emtech

• First computer : EINAC
• First commercial computer : UNIVAC
• Data : collection of raw unprocessed facts
• Hardware : actual machine, wires, transmitters and circuits
• Software: consists of instructions/ program for controlling the computer
• Peripherals : inout and output device
• Information : Data transformed into meaningful form
• IPOS means : Input, Process, Output, Stores
• Computer literate : you can use today’s computer efficiently
• Digital Divide : economic gap
• Types of interface : GUI, Command line interface
• Two Types of Software : System Software, Application Software
• System Software : Runs the computer
• Application Software : Needs to be downloaded
• Application Software : helps you to complete a specific task
• Two Types of System Software : Operating system and Utility Program
• Operating system : coordinate the resources and activities
• Utility Program : protects/ secure the computer
• Personal computer : Desktop, single computer, multitasking
• Mobile operating system: designed for small handheld devices ( phones, tablets)
• Sever operating system : resides on a sever and manage a network
• Network Administrator - who checks your history
• Embedded operating system - ATMS, Navigation system, Portable media players
• Task operating system : Boot process, Resources, Buffer
• Boot process - series of step
• Resources - managaing memory, any component the system requires to do work
• Buffer - Temporary memory ( Loading )
• Circuit board another name is the Mother Board
• Mother board - expansion slot ( video card, wireless card )
• CPU know as a processor, single chip, brain of the computer
• CPU Stands for Central Processing Unit
• Cache memory is used by CPU to store data that it uses most often.
• RAM stands for Random Access Memory
• ALU stands for Arithmetic Logic Unit
• ALU perform arithmetic calculations and logical operation
• Control Unit coordinates all the processor's activities and manages the flow of information
• Binary is the computer language
• Register is a small memory space needed by ALU to perform calculations
• Machine cycle only happen in the CPU
• Fetching Data item from memory,