Jan 03, 2016
Intro to Computers
Understanding Computers and Computer Literacy
ObjectivesDiscuss the history of computers.Define the term computer and describe a computer system.Describe the five computer classification categories.
Objectives (cont.)Describe the two types of computer software.Describe communications and networks.Identify how we use computers and technology in our daily lives
Introducing ComputersComputers are considered one of the most important conventions of the 20th century.Their widespread use affects us individually and as a society.
A Brief History of the ComputerThe first computers were developed in the late _____ and early ______.In 1971, Dr. Ted Hoff developed the ________________.Steve _____ and Steve Wozniak built the first ________ computer in 1976.
What Is a Computer?A computer is an ______________ thatReceives data ______________________ the data it receivesStores the data in __________ or on some storage device, such as a disk or CDOutputs information on a device, such as a ___________________
What Is a Computer System?A _____________________ includes hardware, software, data, information, and people.___________: The machine including the wires, transistors, and so on___________: Instructions or programs that control the computer________: Text, numbers, sound, images, video_____________: Output_____________: Users of the computer
The Processing Cycle of a ComputerThis figure shows the typical _________________________ Once it receives a set of data, the computer _____________ it and produces a _________ at the end of the cycle.
Are Computers Intelligent?As complex as some computers may be, they all essentially perform two operations:_____________ operations such as addition, subtraction, multiplication, and division_____________ operations, such as comparing two values and taking some action based on the result of the comparisonGreater than, less than, or equal to
What Makes a Computer So Powerful?Although computers perform only basic operations, theyPerform those ___________ very quicklyProduce ______________ resultsStore large amounts of _____Provide versatility through various __________Share _________ with other computersAre becoming more powerful and easier to use
Classifying ComputersTwo categories of computers:_____________ purposeUsed to control devices, such as radar detection or a microwave oven_____________ purposeFive categories based on size, function, cost, and performance
General-Purpose Computers__________: Personal computer in which all components fit on or under a desk________: Personal computers, such as notebook computers and tablet PCs____________: Used by medium-sized companies; generally supports hundreds of users
General-Purpose Computers (cont.)____________: Large, very expensive machines that can support thousands of users; used by large corporations______________: Used for specialized operations requiring mathematical operations
Types of Personal Computers
Computer SoftwareTwo basic types____________: Performs specific tasks for users (example: word processing)_________: Software that controls the computers operating system (example: Microsoft Windows)
Electronic Communications________________________ is the technology that allows computers to talk to each other and to other devices.
Electronic Communications (cont.)The four components of electronic communication are_________: The computer sending a message_________: The computer receiving the message_________: The media that carries the message_________: The rules that govern the processing of a message between computers
Electronic Communication Components
Network SystemsA __________ consists of multiple computers connected to each other to share data and resources.__________________ programs usually are stored on a central computer called a server.When network computers are located in the same general area, such as the same building or a department, it is called a local area network.
A Typical Network LayoutIn a typical network layout, the client or user computers are connected to a hub, which also is connected to the server. Client or user computersData and programs are stored on the server. All clients can access data and pro-grams through the server and can access the printer attached to the server.Hub
Other Types of NetworksSome other types of networks in common use today are as follows:___________: This is a network that may be set up for employees of a business or students at a university that is not accessible to users outside of those institutions.___________: This typically is an intranet that allows certain users, such as suppliers or customers, to access the internal network.
The InternetThe _________ evolved from a government research project that enabled the military and scientists around the world to share information.Today, it is the largest network in the world.Millions of people use it daily.It is a critical and valuable business tool used by businesses of all sizes.
Technology for Everyday LifeExamples of the ways in which our lives are affected by computers daily:Electronic security systems________Government research operationsComputerized appliances
Computers in Our FutureComputers of the future will be______________More __________More people will work from home.________________ will be commonplace.
SummaryComputers have been around for more than 60 years.A computer is an electronic device that receives data, processes data, and produces information.A computer derives its power from its speed, reliability, accuracy, storage, and communications capability.
Summary (cont.)Computer classifications include personal computers (desktop and notebook), mobile devices, mid-range servers, mainframes, and supercomputers.The two basic types of software are application software and system software.Electronic communications enable computers to communicate with each other and other devices.
Summary (cont.)A network is a group of two or more connected computers, an intranet is a closed network within an organization, and an extranet is a closed network for an organization and its customers and suppliers.The Internet is the worlds largest network.
Summary (cont.)Computers and technology affect almost every facet of our daily lives.Computers in our future will be more powerful and less expensive.Computer literacy is the ability to use a computer and its software to accomplish practical tasks.