What Is a Computer? A computer is a programmable machinewith two principal characteristics:• Computer.. Latin word.. Compute• Calculation Machine• It responds to a specific set of instructions in awell-defined manner.•It can execute a prerecorded list ofinstructions (a program). A computer system includes a computer,peripheral devices, and software
Introductions to ComputerA computer has four (4)functions:a. accepts data Inputb. processes data Processingc. produces output Outputd. stores results Storage
Input (Data):is the raw information entered into a computer from theinput devices. It is the collection of letters, numbers,images etc. Process:is the operation of data as per given instruction. It is totallyinternal process of the computer system. Output:is the processed data given by computer after dataprocessing. Output is also called as Result. We can savethese results in the storage devices for the future use. Storage:is the area where data can be left on a permanent basis.Four Functions:
Elements of A Computer People:They run and operate the computer. Procedure:are normally written in manuals of hardware andsoftware manufacturers. Software:is to do process data into useful information forpeople. Hardware:the physical equipment that you can feel andtouch.
Elements of A Computer Data:include texts and numbers, sounds, images,and videos that you input into the computerfor processing. Connectivity:- a computer must be connected to othercomputers especially through the internet.- using the internet, people can share andaccess data from all over the world.
Capabilities of Computers Speed:computer operates on data and commands at incrediblyfast speed. Storage:computer can store enormous amount of data andinformation in its memory. Reliability:computers made of modern technology rarelybreakdown and when they do, they are easily repaired. Consistent:if you input the same data into the computer using the sameprogram, it will give you the same result all the time. Communicate:people can connect with others by the use of computers.
Ten Commandments ofComputer Ethics Thou shalt not use a computer to harm other people. Thou shalt not interfere with other peoples computer work. Thou shalt not snoop around in other people’s files. Thou shalt not use a computer to steal. Thou shalt not use a computer to bear false witness. Thou shalt not use or copy software for which you have notpaid. Thou shalt not use other people’s computer resources withoutauthorization. Thou shalt not appropriate other people’s intellectual. Thou shalt think about the social consequences of theprogram you write. Thou shalt use a computer in ways that show considerationand respect.
Disadvantages of using Computers Safety and Security:people have to be careful in sharing photos andpersonal information on the computer andinternet. Health Risks:long and improper use of the computer can leadto injuries and hazards to the user. Environment:old computers must be disposed off properly.
Disadvantages of using Computers Use of Power:computers need electricity to run. Computers onlyneed a small amount of electric power but withmany computers around, this results to high totalrequirement. Privacy Violation:personal information when stored in a computercan be viewed and stolen.
SoftwareSoftware exists as ideas,concepts, and symbols, but it has nosubstance.- are sets of instructions that tellthe computer what to do to fulfill itstask.
Kinds of Software System Software:- are programs that the computer uses.- is a collection of programs which includes theoperating system, utilities and drivers.o Operating System:is a program that is basically responsible for thecoordination, management and sharing ofhardware resources and tasks in the computer.o Utility Software:is a program that performs maintenance tasks for thecomputer resources, such as clean up and organizing files andprograms so they would load and work faster.
Kinds of Softwareo Device Driver:is a program that allows a particular hardware deviceto work and with the computer system. Applications Software:are the programs that people use for their day to daytasks on the computero Basic application software:includes word processor, spreadsheet, databaseand presentation software.oSpecialized application software:includes software for graphics, multimedia,audio, video, web designing and many other app.that focus on a certain discipline or profession.